{"id":1711,"date":"2017-03-15T16:54:50","date_gmt":"2017-03-15T16:54:50","guid":{"rendered":"http:\/\/www.experimentoscientificos.es\/?page_id=1711"},"modified":"2018-06-20T09:03:53","modified_gmt":"2018-06-20T09:03:53","slug":"ph","status":"publish","type":"page","link":"https:\/\/www.experimentoscientificos.es\/en\/ph\/","title":{"rendered":"pH - What it is, how to measure it"},"content":{"rendered":"<p>The <strong>pH<\/strong> is both a very simple and a very complex term. The pH is a value that gives you the degree of <strong>acidity<\/strong>\u00a0o <strong>alkalinity<\/strong> of a product, be it water, soap, soil,... :<\/p>\n<ul>\n<li>The difference in pH between elements causes chemical reactions (<a href=\"https:\/\/www.experimentoscientificos.es\/en\/reacciones-acido-base\/\">acid-base reactions<\/a>). These reactions are one of the most important in chemistry, and responsible for the natural reactions of the planet.<\/li>\n<li>The first measure of the health of our ocean\/sea is determined by its pH.<\/li>\n<li>It is a value given to us by the health of our own body (through urine, blood and saliva).<\/li>\n<\/ul>\n<p>In short, it is not only a large part of science experiments or scientific actions that are related to pH. A great many actions in our daily lives, even if we are not aware of it, are determined by pH.<\/p>\n<h2>WHAT IS PH. DEFINITION OF PH<\/h2>\n<p>If you have never heard of pH, here is a 5-line summary of what pH is. pH is a measure of the <strong>acidity and alkalinity<\/strong> of a substance. It ranges from 0 to 14. A substance with a pH between 0 and 7 is a <strong>acidic substance<\/strong> and a substance between 7 and 14 is a <strong>alkaline substance<\/strong>. Drinking water has a pH between 6 and 9. Outside these values it would be harmful to health, as it would be corrosive. When 2 substances have different pH (one being acidic and the other alkaline) they create a reaction. One of the most acidic known products would be hydrochloric acid (with pH less than 1) and one of the most alkaline known would be lye (with pH close to 14).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1443 aligncenter\" src=\"http:\/\/www.experimentoscientificos.es\/wp-content\/uploads\/2017\/03\/escala-ph.jpg\" alt=\"pH\" width=\"497\" height=\"212\" srcset=\"https:\/\/www.experimentoscientificos.es\/wp-content\/uploads\/2017\/03\/escala-ph.jpg 728w, https:\/\/www.experimentoscientificos.es\/wp-content\/uploads\/2017\/03\/escala-ph-300x128.jpg 300w\" sizes=\"(max-width: 497px) 100vw, 497px\" \/><\/p>\n<p>At the level of <strong>definition or concept<\/strong>The pH indicates the concentration of ions in the water, in technical terms, the pH. <a href=\"https:\/\/www.experimentoscientificos.es\/en\/atomo\/\">atom<\/a> of hydrogen (H+) present in a solution. The acronym pH stands for\u00a0<b>hydrogen potential.\u00a0<\/b><\/p>\n<p>The pH is the negative logarithm of base 10 of the activity of hydrogen ions:<\/p>\n<dl>\n<dd><span class=\"mwe-math-element\"><img decoding=\"async\" class=\"mwe-math-fallback-image-inline\" src=\"https:\/\/wikimedia.org\/api\/rest_v1\/media\/math\/render\/svg\/04c5c5a7ad592410ab02d87dff3b00c1c636982e\" alt=\"{\\mbox{pH}}=-\\log _{{10}}\\left[{\\mbox{a}}_{{H^{+}}}\\right]\" aria-hidden=\"true\" \/><\/span><\/dd>\n<\/dl>\n<p>The term pH has become established and universally used as it describes in a simple way what would otherwise have to be done with very complex figures.<\/p>\n<h2>PH SCALE<\/h2>\n<ul>\n<li><strong><a href=\"http:\/\/www.experimentoscientificos.es\/en\/ph\/escala-del-ph\/\">pH scale<\/a><\/strong>. The pH scale is a numerical scale ranging from 0 to 14. Knowledge of the scale is essential to be able to work with pH. Here you can see the <a href=\"http:\/\/www.experimentoscientificos.es\/en\/ph\/escala-del-ph\/\">pH scale<\/a>. You will see that it is a scale that goes from 1 to 14, where 1 to 7 corresponds to acid pH and 7 to 14 corresponds to alkaline pH. Acidic products are those products that are going to have a pH lower than 7, be it citric acid, <a href=\"https:\/\/alquera.com\/acido-borico\/\">boric<\/a> or any kind of acid.\u00a0<a href=\"http:\/\/www.experimentoscientificos.es\/en\/escala-del-ph\/\">Read ph scale<\/a><\/li>\n<\/ul>\n<h2>PH MEASUREMENT<\/h2>\n<p>There are various ways of measuring pH. From simple, homemade devices, measuring strips, and also measuring indicators. Depending on the degree of accuracy you want to achieve (and the budget and time you are going to spend on pH measurement), you have different ways of measuring pH. At <a href=\"https:\/\/www.experimentoscientificos.es\/en\/ph\/medidores-de-ph\/\">this section<\/a> you can find all the information about pH meters.<\/p>\n<ul>\n<li><strong><a href=\"http:\/\/www.experimentoscientificos.es\/en\/ph\/medidores-de-ph\/\">pH meters<\/a>.\u00a0<\/strong>Nowadays you will find many tables and values on the internet with many, many typical pH values. However, knowing how to measure pH, and being able to apply it, is a technique that you will never be lacking. From the pH in your pool water to the pH in your tap at home. If you want to make soaps, creams, grow plants,... measuring pH will be essential. Here are some of them <a href=\"http:\/\/www.experimentoscientificos.es\/en\/ph\/medidores-de-ph\/\">pH meters <\/a>simple, such as ph-meters or pH indicators, phenol red, phenolphthalein, methylene blue...<\/li>\n<\/ul>\n<div style=\"margin-top: 40px; margin-bottom: 20px;\">\n<h2>PH EXPERIMENTS<\/h2>\n<div class=\"facetwp-template\" data-name=\"pexp\">\n<div style=\"margin-top: 20px\">\n\n\n<div style=\"float: left; width: 18%\">\n<\/div>\n<div style=\"float:left; width: 78%; margin-left: 2%\">\n<div>\n\n<div><h3 class=\"entry-title\" style=\"\"><a href=\"https:\/\/www.experimentoscientificos.es\/en\/experimento-medir-ph-salinidad-agua\/\">Experiment Measuring Seawater pH and Salinity<\/a><\/h3><\/div>\n\n<strong><\/strong> Do we know the water we bathe in? With this experiment we are going to find out some basic parameters of the water in which we usually bathe.<\/div>\n\n<\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n<div class=\"clear\"><\/div>\n\n\n\n<div style=\"margin-top: 20px\">\n\n\n<div style=\"float: left; width: 18%\">\n<\/div>\n<div style=\"float:left; width: 78%; margin-left: 2%\">\n<div>\n\n<div><h3 class=\"entry-title\" style=\"\"><a href=\"https:\/\/www.experimentoscientificos.es\/en\/medidas-ph-liquidos-hogar\/\">pH measurements of household liquids<\/a><\/h3><\/div>\n\n<strong><\/strong> In this experiment, we can learn the basics of pH by measuring it in common liquids that we have at home: lemon juice, bleach, water...<\/div>\n\n<\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n<div class=\"clear\"><\/div>\n\n\n\n<div style=\"margin-top: 20px\">\n\n\n<div style=\"float: left; width: 18%\">\n<\/div>\n<div style=\"float:left; width: 78%; margin-left: 2%\">\n<div>\n\n<div><h3 class=\"entry-title\" style=\"\"><a href=\"https:\/\/www.experimentoscientificos.es\/en\/experimentos-acido-citrico-bicarbonato-sodio\/\">4 Experiments with citric acid and bicarbonate of soda<\/a><\/h3><\/div>\n\n<strong><\/strong> The reaction that takes place between citric acid and sodium bicarbonate is an acid-base reaction, which is very controlled, but at the same time allows for fun, simple and eye-catching experiments. <\/div>\n\n<\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n<div class=\"clear\"><\/div>\n\n\n\n<div style=\"margin-top: 20px\">\n\n\n<div style=\"float: left; width: 18%\">\n<\/div>\n<div style=\"float:left; width: 78%; margin-left: 2%\">\n<div>\n\n<div><h3 class=\"entry-title\" style=\"\"><a href=\"https:\/\/www.experimentoscientificos.es\/en\/experimento-del-volcan\/\">Volcano Experiment<\/a><\/h3><\/div>\n\n<strong><\/strong> In this fun experiment you will be able to see a small acid-base reaction, very funny and eye-catching as CO2 gas is generated, with the products coming out of the container where it is located. <\/div>\n\n<\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n<div class=\"clear\"><\/div>\n\n\n    <\/div>\n<p>You can also see all the\u00a0<a href=\"http:\/\/www.experimentoscientificos.es\/en\/\">experiments for children<\/a>.<\/p>\n<h2>WATER PH<\/h2>\n<ul>\n<li><strong><a href=\"http:\/\/www.experimentoscientificos.es\/en\/ph\/ph-del-agua\/\">Water PH<\/a><\/strong>. If there is one place where pH is of utmost importance, it is in water. Whether it is tap water, swimming pool water or, above all, seawater and ocean water. The <a href=\"http:\/\/www.experimentoscientificos.es\/en\/ph\/ph-del-agua\/\">Water pH<\/a> will tell us whether the conditions in the water are suitable for animals and plants to live in. Drinking water is at a certain pH level. The chlorine in the swimming pool only disinfects if it is at a certain pH level.<\/li>\n<\/ul>\n<h2>PH NEUTRAL<\/h2>\n<p>The term pH can sometimes lead to confusion. A neutral pH, as you can see on the <a href=\"https:\/\/www.experimentoscientificos.es\/en\/ph\/escala-del-ph\/\">pH scale<\/a>is equivalent to <strong>pH=7<\/strong>. However, the term neutral is often used in body cleansing products. Neutral pH in cosmetic products refers to a pH similar to that of the skin. This <strong>pH is 5.5<\/strong>. There are different opinions on whether it is appropriate to use products with the exact pH of the skin, since on the other hand, cleansing products, in order to maintain their oil-cleansing capacity, by definition have an alkaline pH (greater than 7).<\/p>\n<h2>ALKALINE PH<\/h2>\n<p>Alkaline pH refers to a pH greater than 7. The term alkaline, alkaline diet, alkaline water, is gaining more and more importance, as there are many studies that endow the alkaline diet (diet composed of alkaline pH foods) as the healthiest diet. As in all health matters, no such article should be taken as valid unless it is validated by a medical institution. To recognise an article that is not based on scientific data, look for the inclusion of lemon juice as an alkaline food. Many of these articles do, when lemon juice (citric acid) has a pH around 2, i.e. it is clearly very acidic.<\/p>\n<h2>PH IN SWIMMING POOLS<\/h2>\n<p>If there is one place where we are accustomed to the term pH, it is in swimming pools. The pH is a parameter that is practically measured in swimming pools to ensure water quality within parameters suitable for human bathing, as well as to ensure that the pH is within the values at which chlorine can fulfil its disinfection mission. The pH of swimming pools must maintain its value between <strong>7,2 y 7,6<\/strong>. You can read more information here: <a href=\"https:\/\/www.experimentoscientificos.es\/en\/ph\/ph-del-agua\/#piscina\">pH in pool water<\/a>.<\/p>\n<h2>OTHER PH VALUES<\/h2>\n<div style=\"text-align: center; margin-left: 20px;\">\n<table>\n<thead>\n<tr>\n<td><b>PH PER SUBSTANCE<\/b><\/td>\n<td><strong>PH VALUE<\/strong><\/p>\n<p>(lower pH-&gt; more acidic;<br \/>\nhigher pH-&gt; more alkaline)<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Sulphuric Acid<\/h3>\n<\/td>\n<td>0<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Hydrochloric acid<\/h3>\n<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Citric Acid<\/h3>\n<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Orange juice<\/h3>\n<\/td>\n<td>3<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Tomato juice<\/h3>\n<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Black coffee, banana<\/h3>\n<\/td>\n<td>5<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Milk<\/h3>\n<\/td>\n<td>6<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Pure Water<\/h3>\n<\/td>\n<td>7<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Sea Water, Eggs<\/h3>\n<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Sodium Bicarbonate of Soda<\/h3>\n<\/td>\n<td>9<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Milk of Magnesium<\/h3>\n<\/td>\n<td>10<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Ammonia<\/h3>\n<\/td>\n<td>11<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Laundry Detergent<\/h3>\n<\/td>\n<td>12<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Bleach<\/h3>\n<\/td>\n<td>13<\/td>\n<\/tr>\n<tr>\n<td>\n<h3 style=\"font-size: 14pX; font-weight: normal;\">pH Sodium hydroxide<\/h3>\n<\/td>\n<td>14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>WHY PH IS IMPORTANT<\/h2>\n<p>Nearly all natural processes in nature are a continuum\u00a0<strong>search for pH balance<\/strong>.<\/p>\n<p>Knowing the pH and knowing how to measure it can help us to\u00a0<strong>make thousands of important decisions<\/strong>not only in nutrition, but also in personal care, cleanliness,..., it is also a\u00a0<strong>water as a major factor<\/strong>The water we drink, the pool, the sea and the ocean.<\/p>\n<ul>\n<li>The ocean is the planet's great climate regulator. It manages to absorb CO2 by keeping the pH in balance. An imbalance in the ocean's pH would mean the disappearance of most of the species we know.<\/li>\n<li>Our body is the other major pH balancer. Most processes occur at certain pH values. Digestive processes, blood, urine, all have their optimum pH values.<\/li>\n<li>When we feel heavy, we drink something acidic like lemon juice for digestion, and when we have acidity we drink a staple. The pH of food is essential to know how it affects our diet.<\/li>\n<li>If you have ever used a plunger, its \"almost magical\" operation is due to its high pH value, which is able to react with and dissolve substances of lower values.<\/li>\n<li>The most colourful chemical experiments for children, there are 2 types of reactions: acid-base reactions (where the pH is involved) and oxidation-reduction reactions (where the oxidation potential is involved). These are the 2 most important reactions in human life and in nature.<\/li>\n<\/ul>\n<p>As you can see, pH is all around us. By knowing pH we can know ourselves better, and make smarter choices about what we eat, our hygiene and know our nature better, starting with the sea, the ocean.<\/p>\n<div style=\"margin-top: 40px; margin-bottom: 20px;\">\n<h2>OTHER IMPORTANT PARAMETERS<\/h2>\n<p>The pH is a characteristic, especially when we are talking about very important liquids. Other physico-chemical parameters of matter that will interest you are sure to be of interest:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.experimentoscientificos.es\/en\/densidad\/\">Density<\/a><\/li>\n<li><a href=\"http:\/\/www.experimentoscientificos.es\/en\/conductividad\/\">Conductivity<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The pH is both a very simple and a very complex term. The pH is a value that gives you the degree of acidity or alkalinity of a product, whether it is water, soap, soil,... The difference in pH between elements causes chemical reactions (acid-base reactions). These reactions are one of the most important ones [...].<\/p>","protected":false},"author":1,"featured_media":1782,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>pH - Qu\u00e9 es, c\u00f3mo medirlo<\/title>\n<meta name=\"description\" content=\"Toda la informaci\u00f3n relativa al pH, qu\u00e9 es, c\u00f3mo medirlo, valores del ph de l\u00edquidos de casa. Valores del pH del agua. 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