Chemistry Help!

[thementor]

Please tell me the answer of this question:
5070 November 2005
Paper 2
Question 5 (a), the calculation is bugging me! And as far as I think the ms is wrong, because there are other two misprints.

 

[Nabeel.Ahmad]

What topic?
And Link?

 

[Saad Mughal]

Yes, the answer given in the marking scheme is wrong (since they did not divide the number of moles by 2).
2 moles of HCl react to form 1 mole of CO2, hence:
Volume of HCl = [(25/1000)(1.5)/2] * 24 = 0.45 dm^3 = 450 cm^3.