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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: wildareal on April 21, 2010, 08:07:17 pm

Title: Stoic Questions
Post by: wildareal on April 21, 2010, 08:07:17 pm

200ml of 1.05M silver nitrate is added dropwise to 25mL of sodium chloride until all the chloride precipitates as silver chloride:

AgNO3(aq)+NaCl(aQ)----->AgCl(s)+NaNO3(aq)

a) What is the concentration of the original sodium chloride solution?
b) what is the mass of silver chloride precipitated.

2. When 24ml of a solution of H2SO4 is reacted completely with 18.50mL of 0.300 M BaCl2, a precipitate of BaSO4 forms.
a) write a balanced equation for the reaction
b) determine the concentration of the H2SO4

Thanks :)

Title: Re: Stoic Questions
Post by: superflya on April 21, 2010, 08:17:49 pm

a) find mols of AgNO3 then use molar ratios to find mols of NaCl.
b)m=n*M

2a)BaCl2 + H2SO4 --> BaSO4 + 2HCl
b)find mols of BaCl2 then use molar ratios.