[Urgent] Titration Problem!


by lazybone
Tags: titration, urgent
lazybone
lazybone is offline
#1
Feb19-12, 01:05 PM
P: 2
1. The problem statement, all variables and given/known data
Titrate 60ml of .15M of HNO3 with .45M NaOH.
A) Give pH of Initial Point.
B) Give pH of Equivalent Point.
C) Give pH of Mid Point.
D) Give pH of End point.

2. Relevant equations
nacid=nbase


3. The attempt at a solution
A) I think I did this right.
HNO3-> H + NO3
Strong Acid = 100% dissociated
pH= .8
B)nacid=nbase
(.15M)(.06L)=(.45M)x L
= .02L~20ml
C) I'm stuck here. Strong acid+ strong base = 1/2 neutralization.
???/(.06+.02/2) =
I don't get how I get the top part of that equation. The answer was said to be, .064M H+. pH = 1.2.
D) Strong Acid + Strong Base = H20, pH = 7.

Please help!!! I have a test this tuesday.
Phys.Org News Partner Science news on Phys.org
Simplicity is key to co-operative robots
Chemical vapor deposition used to grow atomic layer materials on top of each other
Earliest ancestor of land herbivores discovered
Borek
Borek is offline
#2
Feb19-12, 04:18 PM
Admin
Borek's Avatar
P: 22,656
You have not answered B, volume is not pH.

C is just an excess reagent questions. Compare this pH calculation question.

D doesn't make much sense as asked. End point depends on the detection method, if you are not told how it was detected, you can't say at what pH it was detected.


Register to reply

Related Discussions
Easy Acid-Base titration problem... i think URGENT! Chemistry 3
Urgent Magnetic Field Problem!!! Urgent!!!!!!!!!!please Help! Introductory Physics Homework 14
forces problem(urgent urgent help needed) Introductory Physics Homework 3
EDTA titration?!!!URGENT NEED HELP Biology, Chemistry & Other Homework 3
Titration problem Introductory Physics Homework 0