What effect does the concentration of $H^+_{(aq)}$ ions have on the nature of the solution ?
Concentration of $H^+_{(aq)}$ can have a varied effect on the nature of the solution. With an increase in $H^+$ ion concentration, the solution becomes more acidic, while a decrease of $H^+$ ion causes an increase in the basicity of the solution.
A solution turns red litmus blue, its $pH$ is likely to be
What is a neutralisation reaction? Give two examples.
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas ?
Metal compound $A$ reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
How is the concentration of hydroxide ions $(OH^-)$ affected when excess base is dissolved in a solution of sodium hydroxide ?