Friday
October 24, 2014

Homework Help: Chemistry

Posted by Rayana on Sunday, October 10, 2010 at 6:48pm.

Expt #1- Molecular Weight of Unknown Acid

Unknown Acid: #2
Mass of Unknown solid acid transferred:0.414g
Volume of volumetric flask: 100.00 mL
Concentration of NaOH: 0.0989 M
Aliqot of acid titrated with NaOH: 25.00 mL
Average volume of Naoh from titration: 13.9 mL

Here's where I need help:

No of moles NaOH used: ? mol
--This is wat i did:
. n=C.V
. =(0.0989M)(0.001375L)
. =0.001375mol



Molar ratio of base to acid?
. Diprotic acid. so 2:1

The unknown acid is mono, di, triprotic acid:? Diprotic

The titration reaction was:?
. H2A + 2NaOH --> 2H2O +Na2H
. where A is the unknown acid compound

No. of moles acid in 25 mL solution:?

. HELP >.<' I dont understand the
. question :P But here is wat i think
. of it. (0.414g)x(25mL/100ml)
. =0.1035 g of acid used in
. the titration.
. HELP?!??

Gram-Molecular acid in 25mL solution?

HELPPPP ! ! ! ! :( :(

ANY AMOUNT OF HELP WILL BE GRATEFUL! PLZ N THANK YOU :D

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - I there, this is my lab worksheet, I am having trouble filling it ...
Chemistry - Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g ...
Chemistry, pH, Buffers - Please help!! Given this data: mass of unknown acid 1....
Chemistry, Buffers, pH - Hi could someone please help me in the next 5 minutes ...
Chemistry - Find the Molecular weight of unknown acid #5... Mass of acid #5 = 1....
chemistry - You weigh a sample of a monoprotic unknown acid and dissolve it in ...
College Chemistry - You weigh a sample of a monoprotic unknown acid and dissolve...
Chemistry - Lab: Titration of NaOH (0.1 molar)to unknown solid acid. Trying to ...
Chemistry - Include an explanation, balanced chemical equation, units, ...
chemistry - You weigh a sample of a monoprotic unknown acid and dissolve it in ...

Search
Members