What are the respective pH values of water, sulphuric acid and ammonium hydroxide?
7, less than 7, more than 7
Less than 7, 7 and more than 7.
Less than 7, less than 7 and 7.
More than 7, more than 7 and less than 7
Acids have pH values less than 7, water has a pH value of 7, bases have pH values of greater than 7. 0 < acid < 7 = water < bases < 14
(a) What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7?
(b) What do you think will be the pH of an antacid solution: less than 7 or more than 7?
(c) How does an antacid work?
(d) Name two common antacids.
Give one example each of a salt which gives an aqueous solution having :
(a) pH less than 7
(b) pH equal to 7
(c) pH more than 7