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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: 1063
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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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