1. What is a universal indicator ? For what purpose it is used? 2. Solutions A,B,C and Dhave pH values 3,4,5 and 6 respectively. Arrange them in increasing order of acidic characteristic giving reason. 3. Which has moreH+ concentration, 1M HCl or 1M CH3COOH? Why? 4. How is the concentration of hydroxide ions affected when excess sodium hydroxide is dissolved in a solution of sodium hydroxide? 5. A milkman adds a very small amount of baking soda to fresh milk . Why does he shift the pH of the fresh milk? 6. What is an antacid ? Give 2 examples.
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1 universal indicator is a mixture of different indicators. it is used to check pH of a solution.
2,,,,,,,,,,6,5,4,3 is the increasing order as acidic character increases when the pH decreases.
3.....1M HCl as it is a mineral acid
4....when excess of NaOH is added then solution will turn more basic as concentration of OH ions ppm will increase
5.......he do so to make the milk neutral so that it does not change into acid quickly.
6.... substance that reduces the effect of acid using neutralisation Reaction is called antacid. eg Baking soda and MgOH
2,,,,,,,,,,6,5,4,3 is the increasing order as acidic character increases when the pH decreases.
3.....1M HCl as it is a mineral acid
4....when excess of NaOH is added then solution will turn more basic as concentration of OH ions ppm will increase
5.......he do so to make the milk neutral so that it does not change into acid quickly.
6.... substance that reduces the effect of acid using neutralisation Reaction is called antacid. eg Baking soda and MgOH
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