If $0.4 \ g$ of $NaOH$ is present in $1 \ L$ of solution,then the $pH$ of the solution is .....

The $pH$ of a solution obtained by mixing $10 \ mL$ of $0.1 \ M$ $HCl$ and $40 \ mL$ of $0.2 \ M$ $H_2SO_4$ is (Given $\log 17 = 1.23, \log 5 = 0.7, \log 10 = 1$)

When an aqueous solution of a strong acid with $pH = 5$ is mixed with an equal volume of an aqueous solution of a strong acid with $pH = 3$,what will be the $pH$ of the resulting solution?

How many liters of water must be added to $1 \ L$ of an aqueous $HCl$ solution with $pH = 1$ to make the $pH$ of the resulting solution equal to $2$ (in $L$)?

What is the pH of $10^{-8} \ M \ HCl$ solution?

Water is added to $1.0 \ mL$ of $0.1 \ M$ $HCl$ solution to make the total volume $50 \ mL$. Calculate the $pH$ change of the solution.