Question 4 The pH of a solution is 5.What will be its action on blue and red litmus? More basic a solution is more will be its pH. A pH of 7 means it is a neutral solution. The pH scale is logarithmic and hence, each whole pH value below 7 is ten times more acidic than the next higher value. The values lower than 7 are more acidic while higher values more alkaline. Importance of pH. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion into numbers between 0 and 14. 1 Class 10 Science Chapter 2 Important Questions with Answers Acids, Bases and Salts. Understand the meaning of pH and pH scale and how the change in pH affects... Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day. Verify your number to create your account, Sign up with different email address/mobile number, NEWSLETTER : Get latest updates in your inbox, Need assistance? She has started this educational website with the mindset of spreading Free Education to everyone. The particular salt made depends upon the acid and base used. When we take a drop of the test solution and place it on universal indicator paper, the paper turns a particular colour. P represents potenz means power whereas H represents concentration. Question 8 Fresh milk has a pH of 6>how do you think the ph would change as it turns into curd? 14 = pH + pOH pH … If you're seeing this message, it means we're having trouble loading external resources on our website. More basic a solution is more will be its pH. Want a call from us give your mobile number below, For any content/service related issues please contact on this number. The strength of an acid or base is measured on a scale of numbers called pH scale (0-14). Universal indicator … pH is the negative base 10 logarithm ("log" on a calculator) of the … For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times 10) more acidic than pH … All rights reserved. pH Scale and its Importance ,Acids, Bases and Salts - Get topics notes, Online test, Video lectures, Doubts and Solutions for CBSE Class 10 on TopperLearning. pH indicator is a chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be seen. A pH level of 7 indicates that a substance is neutral, such as pure water. The colour of the indicator paper is then matched against a colour chart showing the pH value for different colours. Question 9 What effect does the concentration of hydrogen ion have on nature of the solution? In order to deal with these large numbers more easily, scientists use a … 1.1 Acids, ... Universal indicator is a mixture of many different indicators which gives different colours at different pH values of the entire pH scale… Copyright Notice © 2020 Greycells18 Media Limited and its licensors. Class 10 Chemistry Acids Bases Salts pH scale A scale developed to measure the concentration of hydrogen ion in a solution is known as pH scale where p in pH implies ‘ potenz ’ in German. Solution with pH=8,9,10 are weak base. The pH runs from 0 (strongly acidic) through 7 (neutral) to 14 (strongly alkaline). Pure water is neutral. 1) Pure water + acid(produce H+) ——-> Concentration of hydrogen ion(H+) increasesSolution will have more of hydrogen ion(H+). If you're behind a web filter, … In 1909 Sorenson gave a scale known as pH scale.The strength of an acid as well as basic solution can be represented by making use of Hydrogen ion concentration (H+)in them.The pH of a solution is inversely proportional to hydrogen ion in it.High the concentration of hydrogen ion lower will be its pH.Lower the concentration of hydrogen ion Higher will be its pH. Anything with a pH … Substances that have a pH level of less than 7 are acidic in nature. where log is the base-10 logarithm and [H +] stands for the hydrogen ion concentration in units of moles per liter solution.The term "pH" comes from the German word "potenz," which means "power," combined with H, the element symbol for hydrogen, so pH … The pH of saliva ranges from 6.5-7.5. (i) It is the negative logarithm of H+ … pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. It is used to determine the strength of … Don’t worry, let us know and we will help you master it. If foreign strong substances dramatically change this pH… Question 2 You have 2 solutions A and B.The pH of solution A is 6 and pH of solution B is 8.Which of the solution has more hydrogen ion concentration? in 1909 S.P.L Sorenson, a Danish biochemist devised a scale known as pH to represents the H + ion concentration of an aqueous solution. A pH of less than 7 means the solution is acidic. Your email address will not be published. The pH scale is logarithmic and inversely indicates the concentration of hydrogen ions in the solution. The pH scale ranges from 0 to 14. Conc HCl pH=1 If [H+] < 10-7, pH is more than 7 and the solution is basic. Only a … Higher the pH,stronger will be a base. Is measured on a scale of 0 to 14 you 're seeing message! Of OH- increases solution will have more of OH- ions is defined as negative. 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