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##### 2. Calculate the pH of 0.1 \mathrm{M} \mathrm{KOH} ?

Classify the following salts as soluble or insoluble salts: iv. Copper sulphate

Classify the following salts as soluble or insoluble salts:i. Sodium chloride

Classify the following salts as soluble or insoluble salts: vii. Sodium carbonate

19. You are in a need of an acidic salt. How can you prepare it?

4. Complete the following Table.Solution \left[\mathrm{H}^{+}\right] [\mathrm{OH}] [\mathrm{pH}] [pOH](i) 0.15 \mathrm{M} \mathrm{Hl} (ii) 0.040 \mathrm{M} \mathrm{KOH} (iii) 0.020 \mathrm{M} \mathrm{Ba}(\mathrm{OH})_{2} (iv) 0.00030 \mathrm{M} \mathrm{HClO}_{4} (v) 0.55 \mathrm{M} \mathrm{NaOH} (iv) 0.055 \mathrm{M} \mathrm{HCl} (vii) 0.055 \mathrm{M} \mathrm{Ca}(\mathrm{OH})_{2}

18. Which one of the following is a Lewis base?a. \mathrm{NH}_{3} b. \mathrm{BF}_{3} c. \mathrm{H}^{+} d. \mathrm{AlCl}_{3}