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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: 689     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.
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1. Determine the average volume of solution B. (5mks)
2. Calculate the number of moles of solution B. (2mks)
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