CHM 121: FOUNDATION CHMISTRY I

INSTRUCTIONS:

(a) Attempt all questions

(b) Write the correct answers only

(c) Constants: 1nm = 10-9m, h=6.625 x 10-34Js and c = 3 x 108m/s, R = 3.289 x 1015Hz

(d) H = 1, C= 12, O= 16, Na = 23, N=14, Ca=40, Cl=35.5

1. Write a balanced equation for tetraoxosulphate (vi) acid and sodium hydroxide

2. 25cm3 of hydrochloric acid was titrated against 20cm3 of sodium hydroxide solution that contains 2.30g in 250cm3. Calculate the concentration of the acid in mole/dm3

3. Calculate (i) Concentration of acid in g/dm3

(ii) Concentration of base in g/dm3

4. ________ and _______ are apparatus for heating