A is solution containing 6.22 g of an acid H2Y per dm3. B contains 3.90...

A is solution containing 6.22 g of an acid H2Y per dm3.
B contains 3.90 g of NaOH per dm3 of solution.
(a) Put A into the burette and titrate it against 20.0 cm3 or 25.0 cm3 portions of B using methyl orange as indicator. Repeat the titration to obtain consistent titres. Tabulate your burette readings and calculate the average volume of acid A used.
The equation for the reaction involved in the titration is:
H2Y(aq) + 2NaOH(aq) Na2Y(aq) + 2H2O(l)
[H = 1.00; O = 16.0; Na = 23.0] [10 marks]

(b) From your result and the information provided above, calculate the:
(i) concentration of B in moldm-3
(ii) concentration of A in moldm-3;
(iii) molar mass of H2Y. [9 marks]
(c) State whether the pH of each of the following solutions is lower than 7, greater than 7 or equal to 7. The:

solution A before titration;
solution B before titration.?

In Physics
5 Answers Available
Asked by Enehigold on 6th September, 2020