MUST SHOW WORK ON HOW TO DO THESE 1)What volume of a .20 M H3PO4 is needed to react with 100 mL of .1 M NaOH?

MUST SHOW WORK ON HOW TO DO THESE

1)What volume of a .20 M H3PO4 is needed to react with 100 mL of .1 M NaOH? 

H3PO4 + 3 NaOH --> Na3PO4 + 3 H2O

2)How many liters of a 3.0 M H3PO4 solution are required to react with 4.5 g of zinc?.

2H3PO4 +3 Zn --> Zn3(PO4)3 + 3H2

3) How many grams of aluminum are required to react with 35 mL of 2.0 M hydrochloric acid, HCl?

6 HCl + 2 Al --> 2 AlCl3 + 3 H2

4)How many grams of Zinc will react with 25 mL of a 4.0 M HCl solution to produce Hydrogen gas?

2HCl + Zn --> ZnCl2 + H2

5)How many milliliters of 0.10 M Pb(NO3)2 are required to react with 75 mL of 0.20 M NaI?

Pb(NO3)2 + 2 NaI --> PbI2 + 2 NaNO3