# #(i)# What volume of #5.00*mol*L^-1# #HCl(aq)# is required to react with a #17.0*g# mass of sodium hydroxide. #(ii)# what volume of sodium sulfide at #0.100*mol*L^-1#, is required to precipitate a #33.0*mL# volume of #0.100*mol*L^-1# of #AgNO_3#?

##### 1 Answer

#### Answer:

We need to find (i) write a stoichiometrically balanced equation, and (ii) we need to find the molar quantities of each reagent.

#### Explanation:

Our basic equation is......

And thus by taking a product or a quotient, we can get the number of moles or the volume of solution.

And thus, for the first equation there is 1:1 stoichiometry. And moles of

And by the give stoichiometry, we need ONE equiv of

We are given

Clear?

For the second scenario, you must simply KNOW that

The net ionic equation is simply......

And thus we need half an equiv of