Question

# A) How many grams of solid silver nitrate would you need to prepare 150.0 mL of...

A) How many grams of solid silver nitrate would you need to prepare 150.0 mL of a 0.140 M AgNO3 solution? B) An experiment calls for you to use 100 mL of 0.30 M HNO3 solution. All you have available is a bottle of 3.8 M HNO3. How many milliliters of the 3.8 M HNO3 solution do you need to prepare the desired solution? C) How many milliliters of water do you need to prepare the desired solution?

A) How many grams of solid silver nitrate would you need to prepare 150.0 mL of a 0.140 M AgNO3 solution?

mol = MV = 0.14*150/1000 = 0.021 mol of Ag needed

mas s= mol*MW = 0.021*107.8682 = 2.265 g of Ag are neede

B) An experiment calls for you to use 100 mL of 0.30 M HNO3 solution. All you have available is a bottle of 3.8 M HNO3. How many milliliters of the 3.8 M HNO3 solution do you need to prepare the desired solution?

M1V1 = M2V2

3.8*V1 = 100*0.3

V1 = 100*0.3/3.8 = 7.89473 ml of acid (concnetrated)

C) How many milliliters of water do you need to prepare the desired solution?

VT = Vwater + Vacid

Vt = 100 and Vacid = 7.89473

then

Vwater= 100-7.89473 = 92.10527 ml

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