# Chemistry HW Help!

1. Nov 13, 2009

### kevin0788

Hi, i have 2 questions about my chemistry homework i can not figure out
The first question is:

1)Silver ions can be precipitated from an aqueous solutions by the addition of aqueous chloride:

Ag+(aq) + Cl-(aq) ---->AgCl(s)

Silver chloride is virtualy insoluble in water so that the reaction appears to go to completion. How many grams of solid NaCl must be added to 25.0mL of 0.326 M AgNo3 solution to completely precititate the silver?

The second question is:

2) A 31.5 mL aliquot of H2SO4(aq) of unknown concentration was titrated with 0.0134 M NaOH(aq). It took 23.9 mL of the base to reach the endpoint of the titration. The concentration (M) of the acid was_____. (be sure to write a balanced chemical equation for the neutralization reaction.)

H2SO4 + 2NaOH ------> Na2SO4 + 2H2O

Can anybody tell me how to go about solving either of these questions?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Nov 13, 2009

### Staff: Mentor

Basically both questions are simple stoichiometry with moles/mass and volume/moles conversions.

How many moles of silver? How many moles of chloride needed? What mass?

http://www.titrations.info/titration-calculation

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methods

3. Nov 14, 2009

### kevin0788

Chemistry

Hi, i have 2 questions about my chemistry homework i can not figure out
The first question is:

1)Silver ions can be precipitated from an aqueous solutions by the addition of aqueous chloride:

Ag+(aq) + Cl-(aq) ---->AgCl(s)

Silver chloride is virtualy insoluble in water so that the reaction appears to go to completion. How many grams of solid NaCl must be added to 25.0mL of 0.326 M AgNo3 solution to completely precititate the silver?

The second question is:

2) A 31.5 mL aliquot of H2SO4(aq) of unknown concentration was titrated with 0.0134 M NaOH(aq). It took 23.9 mL of the base to reach the endpoint of the titration. The concentration (M) of the acid was_____. (be sure to write a balanced chemical equation for the neutralization reaction.)