Shake well and use for the tests below a To the 2cm 3 of solution in a test

# Shake well and use for the tests below a to the 2cm 3

This preview shows page 143 - 145 out of 288 pages. (ii) Pipette 25cm 3 of X 3 into a clean conical flask (iii) Warm this solution to about 50 o C ( Note : Be accurate with temperature) (iv) Titrate the solution in (iii) above against solution X 1 from the burette to a pink colour (v) Record your results in table II. Calculations: (a) Calculate the average volume of X 1 used (b) Calculate the number of moles of : (i) Sodium nitrite in one litre of solution (Na = 23, N = 14, O = 16) (ii) Nitrite ions in 25cm 3 of solution X 3 used (iii) Moles of solution X 1 used (c) (i) Work out the approximate ratio Mno 4 -: NO - 2 (ii) Write down the ionic equation for the reaction between acidified manganate (VII) ions and nitrite ions 2. You are provided with solid M . You are required to: (i) Carry out test on solid M (ii) Record your observations and inferences accordingly. Procedure:- 1. (i) Dissolve solid M in 15cm 3 of distilled water. Divide the resulting solution into six portions.  #### You've reached the end of your free preview.

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