homework help
dictionary
Downloads
Video
tutorials
tutors
My Chemistry Tutor
March 11, 2010, 08:11:26 PM
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
News
:
Home
Help
Search
GoogleTagged
Login
Register
My Chemistry Tutor
>
Ask Chemistry Homework Questions
>
High School Chemistry
>
Need help on this question please
Pages: [
1
]
« previous
next »
Print
Author
Topic: Need help on this question please (Read 763 times)
Sarah12345
Labrat
Posts: 6
Need help on this question please
«
on:
July 02, 2009, 11:34:10 AM »
What mass (g) of AgBr is formed when 35.5 mL of 0.184 M AgNO3 is treated with an excess of aqueous hydrobromic acid (HBr)?
Logged
Text for Header
Powered by LivePerson
kyle1990
Global Moderator
Hero Member
Posts: 805
Re: Need help on this question please
«
Reply #1 on:
July 02, 2009, 12:35:08 PM »
It's often helpful to write out the chemical equation to see what's going on:
AgNO3 + HBr ----> AgBr + HNO3
How many moles of AgNO3 are reacting? (Hint: since there is an "excess" of HBr added, the limiting reagent is AgNO3, thus, however many moles of AgNO3 there are, that's how many moles of AgBr are produced).
Logged
"Theories are nets cast to catch what we call 'the world': to rationalize, to explain, and to master it. We endeavor to make the mesh ever finer and finer."
-Karl Popper
kingchemist
Global Moderator
Hero Member
Posts: 2578
A Liverpool FC fan
Re: Need help on this question please
«
Reply #2 on:
July 02, 2009, 12:36:41 PM »
Write a balanced equation for the reaction
HBr + AgNO3 ---> AgBr + HNO3
1 mole 1 mole
So find the number of moles of AgNO3 using Volume in L x M
You can then see that the same number of moles of AgBr will be formed. (*)
Then find what 1 mole of AgBr weighs (approx 108+80 = 188g)
Then find what the calculated number of moles (*) weigh
«
Last Edit: July 02, 2009, 12:38:31 PM by kingchemist
»
Logged
'Chemistry is not just the study of matter; Chemistry is the study which matters!' - Kingchemist
Pages: [
1
]
Print
« previous
next »
Jump to:
Please select a destination:
-----------------------------
Ask Chemistry Homework Questions
-----------------------------
=> High School Chemistry
=> AP Chemistry
=> College Chemistry
=> Organic Chemistry
=> New Tutorials
-----------------------------
Ask Chemistry Lab Questions
-----------------------------
=> College Chemistry Labs
=> High School Chemistry Labs
Share this topic...
In a forum
(BBCode)
[url=http://www.mychemistrytutor.com/forums/index.php?topic=4144.0]Need help on this question please[/url]
In a site/blog
(HTML)
Need help on this question please
My Chemistry Tutor
Promote Your Page Too
Loading...