In a basic aqueous solution,what happens to the basicity of the solution as the concentration of $[OH^-]$ increases?

As the concentration of $[H_{3}O^{+}]$ ions increases in an acidic aqueous solution,what happens to the nature of the solution?

What are strong and weak acids? In the following list of acids,separate strong acids from weak acids: Hydrochloric acid,citric acid,acetic acid,nitric acid,formic acid,sulphuric acid.

$(i)$ What is the $pH$ range for a base?
$(ii)$ How can the strength of a basic solution be increased?

What is the $pH$ value of a basic aqueous solution?

The $pH$ of the gastric juices released during digestion is