GCSE OCR 21st Century Science- C7 Titration Calculations??

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Calculate the formula mass of the metal hydroxide

Average titration value= 31.2

Concentration of HCl= 3.65 g/dm3

Solution contained 5.0g metal hydroxide per dm3

Answer:

3.65 x 31.2/1000 g HCl Ξ 5.0 x 25/1000 g MOH;

36.5 g HCl reacts with 5.0 x 25 x 10/31.2 g MOH = 40.1

Where did they get the 25 from???

Posted Thu 26th May, 2011 @ 15:04 by Chloe Peel
Edited by Chloe Peel on Thu 26th May, 2011 @ 15:06

3 Answers

  • 0 votes

what the full question with the equation it may be a standardised solution

Answered Thu 26th May, 2011 @ 15:21 by Sbegum
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It might be the relative atomic mass but im not sure...

Answered Thu 26th May, 2011 @ 15:31 by Aneesah Sharif
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In the question it gives you the relative atomic masses of H=1, Cl=35.5, O=16

MOH + HCl ---> MCl + H20

Answered Thu 26th May, 2011 @ 15:50 by Chloe Peel