Register to reply

Simple chemistry help needed

by Jaramide
Tags: chemistry, simple
Share this thread:
Jaramide
#1
Dec16-03, 10:38 AM
P: 5
I need to return an asignment today and i just cant figure it out (should be a piece of cake for the people that hangs around here)

There is 10ml HCl with an unknown concentration i a beaker. You let NaOH with the concentration 0,100 mol/dm3 drip into the acid untill it is neutralized.
It takes 10,5ml NaOH to neutralize the acid.

With this you should be able to calculate the concentration of the acid or so my teacher say. And all i can do is sit here and look dumb while my brain refuses to cooperate

Could anyone help me i would owe you a life debt. If i dont get this in today i wont get a grade in chemistry
Phys.Org News Partner Chemistry news on Phys.org
Synthesis produces new antibiotic: Scientists confirm potent synthesis of natural tetracycline
Scientists learn to control reactions with the shape of a rare-earth catalyst
Protein glue shows potential for use with biomaterials
himanshu121
#2
Dec16-03, 11:42 AM
himanshu121's Avatar
P: 658
I have posted hint at http://physicsforums.com/showthread....160#post115160
ShawnD
#3
Dec16-03, 12:20 PM
Sci Advisor
ShawnD's Avatar
P: 986
10.5mL is 0.0105L

mols of NaOH:
0.0105L x 0.1mol/L = 1.05 x 10^-3 mols NaOH

mols of HCl:
1molHCl/1molNaOH * 1.05 x 10^-3 mols NaOH = 1.05 x 10^-3 mol HCl

concentration:
(1.05 x 10^-3 mol HCl) / 0.01L = 0.105 mol/L


Register to reply

Related Discussions
Chemistry help needed! Biology, Chemistry & Other Homework 1
Physical Chemistry 2 - Work function - HELP NEEDED Introductory Physics Homework 4
Chemistry Reduction Reaction Help Needed Biology, Chemistry & Other Homework 6
Opinions Needed on Chemistry softwares, Which is the best? Chemistry 0
Chemistry Question - Help Needed Chemistry 0