Back Titration Calculation Watch

hjkiire
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A student wanted to find the mass of calcium carbonate (CaCO3) in an indigestion tablet. They crushed up a tablet and added an excess of hydrochloric acid (25.0cm3 of 1.00mol.dm3). She then titrated the excess against 0.500mol dm3 NaOH requiring 25.8cm3 of the NaOH. Calculate the mass of calcium carbonate in the tablet.


I'm stuck on this question... I've worked out the mols of HCl and NaOH and the vol of them in dm^-3 but I'm really not sure where to go from there.
Any help would be really appreciated!! Thanks
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TSR Jessica
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Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
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