INSTRUCTIONS
This assignment form part of assessment for these module . the question carries 50 marks and the pass mark is 30 marks .

You only have one chance to sit for these exams and if you fail to reach the pass mark ,you will apply to re-sit for a supplementary on these in which you will only be eligible for a pass grade .

You are at liberty to refer to any literature as long as you do not plagiarize. You are also allowed to seek your tutors advice if unsure . But do not plagiarize

Answer all questions and show your working (where appropriate ) on these paper and submit it through our official email account.

Your tutors comments on the assignment will be communicated through the same channel.

QUESTION

Question 1.
25cm3 of Potassium hydroxide KOH was pipetted and transferred into a conical flask , it was titrated against 0.02M of HCL. On titration , the following volumes of the acid was used in three titration : 22.5cm3 ,24.2cm3, and 23.5 cm3.
Determine the concentration (in moles per liter ) of salt and hence the percentage of the salt in the mixture

Question 2: You are provided with;

(i) Solution A which is a mixture of a salt; XCL (RFM 54. 5g) and an alkali ; XOH(RFM 56g).8.4g of the mixture were made up to one liter of aqueous solution .
(ii) Solution B which is a 0.1M solution of a monobasic acid;HA.

You are required to determine the concentration (in moles per liter ) of salt and hence the percentage of the salt in the mixture