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# Titration calculations!!! watch

1. Solutions for these two questions please!!

1. Solid calcium hydroxide is shaken with water at room temp until a saturated sln is formed. A titration is carried out to find the concentration. 25.0cm^3 of the saturated son are neutralised by 10.5cm^3 of 0.100 mol/dm^3 hydrochloric acid.
Find the solubility of calcium hydroxide in a) mol/dm^3 b)g/dm^3.

2. Ca(HCO3)2(aq) + 2HCl(aq) arrow CaCl2(aq) +2CO2(g) +2H2O(l)
One litre of tap water required 12.0cm^3 of 0.500 mol/L HCl in a titration. Find the concentration of Ca(HCO3)2 in tap water in a)mol/L b)g/L.

Sorry for the length the questions are so wordy...
Thanks
2. Sorry you've not had any responses about this. Are you sure you’ve posted in the right place? Posting in the specific Study Help forum should help get responses.

I'm going to quote in Tank Girl now so she can move your thread to the right place if it's needed.

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3. (Original post by cloug)
Solutions for these two questions please!!

1. Solid calcium hydroxide is shaken with water at room temp until a saturated sln is formed. A titration is carried out to find the concentration. 25.0cm^3 of the saturated son are neutralised by 10.5cm^3 of 0.100 mol/dm^3 hydrochloric acid.
Find the solubility of calcium hydroxide in a) mol/dm^3 b)g/dm^3.

2. Ca(HCO3)2(aq) + 2HCl(aq) arrow CaCl2(aq) +2CO2(g) +2H2O(l)
One litre of tap water required 12.0cm^3 of 0.500 mol/L HCl in a titration. Find the concentration of Ca(HCO3)2 in tap water in a)mol/L b)g/L.

Sorry for the length the questions are so wordy...
Thanks
Work out the number of moles using an equation which links the number of moles, the concentration and the volume.
Then work out the ratio of acid molecules to base molecules and multiply accordingly.
Then, using the equation from the first step, work out the concentration of the base.

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