Assignment:
Q1. Define PH.
Q2. Derive the expression relating PH, POH, and PKw.
Q3. If Kw = 10-14 mol2/dm6, find the PH of water.
Q4. Find the PH of 0.01mol/dm3 of tetraoxosulphate (VI) acid.
Q5. Would the PH of 0.01mol/dm3 hydrochloric acid solution be the same as that of 0.01mol/dm3 tetraoxosulphate (VI) acid solution?
Q6. Calculate the PH of 4g in 250cm3 solution.
Q7. What is the PH of 0.4M solution of calcium hydroxide solution?
Q8. The PH of an alkali is 12. What is the concentration of the alkali, if it contains only one hydroxyl ion?
Q9. The PH of a monobasic strong acid was found to be 5. What is the hydrogen ion concentration of the acid?
Q10. In Q9 above, what is the concentration of the acid?
Q11. Give two methods of determining the PH of an aqueous solution.
Q12. The PH of salt is not always equal to 7. True or false. Explain
Q13. Will the PH of aqueous solution of the following salts equal 7; >7 or <7. Justify.
(a) NaCl (b) CaSO4 (c) NH4Cl (d) CH3COONa
Q14. Give two reasons why ammonia and water are bases.
Q15. What is the range of PH scale?
Provide complete and step by step solution for the question and show calculations and use formulas.