A solid sample of zinc hydroxide is added to 0.290 L of 0.420 M hydrobromic acid. The solution that remains is still acidic. It is then titrated with 0.420 M sodium hydroxide solution, and it takes 92.5 mL of the sodium hydroxide solution to reach the equivalence point.
What mass (in g) of zinc hydroxide was added to the hydrobromic acid solution?
Thanks!
2 Answers
-
moles HBr: 0.290 L x 0.420 M= 0.1218
moles NaOH added: 0.0925 L x 0.420 M= 0.03885
excess HBr: 0.1218 moles – 0.03885 moles reacted with NaOH= 0.08295
2 HBr + Zn(OH)2 —-> ZnBr2 + 2 H2O
from bal rxn., 1 mole of Zn(OH)2 react with 2 moles HBr, 1:2
0.08295 moles HBr x 1/2 x molar mass Zn(OH)2= ans.
-
If you wish to decrease the pain of neuropathy absolutely and forever, eliminate serious nerve suffering and get your flexibility in those days that https://tr.im/iLAkp could be the book for you.
The Neuropathy Solution is an guide where your find 6 methods for fighting neuropathy, 6 ‘natural home remedies ‘, each having a dedicated page and the actual treatment of neuropathy features a devote section of around 40 pages.
The whole guide could be read in an afternoon, which will be good therefore you will get right down to activity earlier and ultimately you are able to benefit from the daily activities.
