When equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed, the pH of the resulting solution will be:

The concentration of hydrogen ion in a sample of soft drink is $3.8$ $\times {10}^{-3}$ $\mathrm{M}$. The  pH of the soft drink will be:

pH of a saturated solution of \(Ca \left(OH\right)_{2}\) is 9. The solubility product \(K_{sp}\) of \(Ca \left(OH\right)_{2}\) is:
1. \(0 . 5 \times \left(10\right)^{- 10}\)
2. \(0 . 5 \times \left(10\right)^{- 15}\)
3. \(0 . 25 \times \left(10\right)^{- 10}\)
4. \(0 . 125 \times \left(10\right)^{- 15}\)

Which of the following salts will give the highest pH in water?
1. KCl
2. NaCl
3. Na₂CO₃
4. CuSO₄

The ionisation constant of an acid, K_a , is the measure of the strength of an acid. The K_a values of acetic acid, hypochlorous acid and formic acid are $1.74\times {10}^{-5}, 3.0\times {10}^{-8}$ and $1.8\times {10}^{-4}$ , respectively. The  correct order of pH value of 0.1 mol dm^-3 solutions of these acids is:

1. Acetic acid > Hypochlorous acid > Formic acid

2. Hypochlorous acid < Acetic acid > Formic acid

3. Formic acid > Hypochlorous acid > Acetic acid

4. Formic acid < Acetic acid < Hypochlorous acid

0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. The pH of the solution will be

The ionization constant of acetic acid is \(1.74 × 10^{–5}.\) The pH of acetic acid in its 0.05 M solution will be:
1. 7.81