Homework Help: chemistry

Posted by Anonymous on Sunday, November 4, 2012 at 5:26pm.

A student determines the zinc content of a solution by first precipitating it as zinc hydroxide, and then decomposing the hydroxide to zinc oxide by heating. How many grams of zinc oxide should the student obtain if her solution contains 42.0 mL of 0.566 M zinc nitrate?

chemistry - bobpursley, Sunday, November 4, 2012 at 5:29pm
moles zinc nitrate=.042*.466 Zn(NO2)2

moles zinc= same number

Moles ZnO=same number

grams Zn oxiide= moles ZnO*formula mass.
chemistry - DrBob222, Sunday, November 4, 2012 at 5:30pm
mols Zn(NO3)2 = M x L = ?
You can get 1 mol Zn(OH)2 from 1 mol Zn(NO3)2; therefore mol Zn(OH)2 = mols Zn(NO3)2.
The same reasoning tells you that you can obtain the same number of mols ZnO.
g ZnO = mols x molar mass.

Answer this Question

Related Questions

chemistry - does this sound right for what happens with the zinc and lead ...
CHEMISTRY - brass is a subtitutional alloy consisting of a solution of copper ...
chemistry - Mildy basic potassium permanganate reacted with 1.25g of ...
chemistry - Zinc combines with hydrochloric acid to form aqueous zinc chloride ...
chemistry - zinc displaces gold in seawater present int he form of gold (III) ...
Chemistry - How many milliliters of a 0.81 M HCl solution are needed to react ...
Chemistry - How many milliliters of a 0.66 M HCl solution are needed to react ...
chemistry - Zinc dissolves in acid according to the balanced equation. Zn(s)+ 2H...
CHEMISTRY - Zinc metal reacts with hydrochloric acid to produce zinc (II) ...
CHEMISTRY - Zinc metal reacts with hydrochloric acid to produce zinc (II) ...

For Further Reading

First Name:
School Subject:
Answer: