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Form 3 Chemistry Paper 3 End of Term 3 Examination 2022

Class: Form 3

Subject: Chemistry

Level: High School

Exam Category: Form 3 End Term 3 Exams

Document Type: Pdf

Views: 661 Downloads: 40

Exam Summary

NAME: ……………………………………………….…………. ADM NO:………… CLASS: ………………
CHEMISTRY FORM 3 PAPER 3 TIME: 1 HR 25 MIN Q1 = 11MKS Q2 = 14MKS

Q1. You are provided with:
Solution A: Potassium Chromate VI
Solution B: 0.1mNa2SO3
You are required to determine the number of moles dichromate VI ions (Cr2O2-7) in one litre of solution.
PROCEDURE Fill the burette with solution B. Pipette 25cm3 of solution A and transfer it into conical flask. Titrate until a permanent green colour is obtained. Record your results in table below and repeat the procedure to fill the table.

1. Determine the average volume of solution B. (5mks)
2. Calculate the number of moles of solution B. (2mks)

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