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    Hi there, I'm new to this, I'm currently in year 12 going to sit my AS Level in Chemistry in May and I'm really struggling with the maths parts of my revision and was hoping someone could help me?
    Question I have is:-
    "The student adds a lump of limestone with mass 0.13 g to 25.00 cm3 of 0.1 mol dm -3 hydrochloric acid and stirs until the reaction is finished, the solution is then filtered. The excess acid in the filtered solution reacts with 7cm3 of 0.1 mol dm -3 sodium hydroxide. The equations for the reactions are CaCO3 + 2HCl --> Ca Cl2 + CO2 + H2O

    HCl + NaOH -->NaCl + H2O

    Calculate the percentage of calcium carbonate in the limestone.

    Any help would be greatly appreciated.

    Many thanks
    Rob
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    Sorry you've not had any responses about this.

    Why not try posting in a specific subject forum- you might have more luck there.

    Here's a link to our subject forum which should help get you more responses.

 
 
 
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