April 29, 2024, 05:29:09 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Question - solutions  (Read 6421 times)

0 Members and 1 Guest are viewing this topic.

Offline JonyP

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Question - solutions
« on: October 10, 2008, 11:24:01 AM »
Hey guys

i have a small question if someone could help me out i'll appreciate it =)

What mass (in grams) of a 0.500m solution of sodium acetate ch3co2na, in water would you use to obtain 0.150 mol of sodium acetate?

thanks!
Logged

Offline JGK

  • Chemist
  • Full Member
  • *
  • Posts: 738
  • Mole Snacks: +66/-19
  • Gender: Male
Re: Question - solutions
« Reply #1 on: October 10, 2008, 11:26:56 AM »
Hint: what are the units Moles as measured in?
Logged
Experience is something you don't get until just after you need it.

Offline JonyP

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Question - solutions
« Reply #2 on: October 10, 2008, 11:29:21 AM »
you mean?
mass/molecular mass
?
Logged

Offline JGK

  • Chemist
  • Full Member
  • *
  • Posts: 738
  • Mole Snacks: +66/-19
  • Gender: Male
Re: Question - solutions
« Reply #3 on: October 10, 2008, 11:38:45 AM »
No if you had a 1M solution what other units of concentration cuould it be expressed in?
Logged
Experience is something you don't get until just after you need it.

Offline JonyP

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Question - solutions
« Reply #4 on: October 10, 2008, 11:39:48 AM »
molarity, molality?
Logged

Offline JonyP

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Question - solutions
« Reply #5 on: October 10, 2008, 11:50:27 AM »
i've tried to use molality

0.500 = 0.150/x

then x = 0.150/0.500

x=3.0

but the answer in the book is 320g \-:
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27665
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Question - solutions
« Reply #6 on: October 10, 2008, 12:12:51 PM »
Quote from: JonyP on October 10, 2008, 11:24:01 AM
What mass (in grams) of a 0.500m solution of sodium acetate ch3co2na, in water would you use to obtain 0.150 mol of sodium acetate?

How many moles of sodium acetate in this solution?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline JonyP

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Question - solutions
« Reply #7 on: October 10, 2008, 12:18:32 PM »
0.500m?
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27665
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Question - solutions
« Reply #8 on: October 10, 2008, 01:35:50 PM »
Sorry, brain slip. Wrong question.

How many moles of acetate in 1 L of solution?

What volume of this solution contains 0.150 mole of acetate?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline JonyP

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Question - solutions
« Reply #9 on: October 10, 2008, 06:18:27 PM »
sorry man i lost u =)

do you know how to solve this?

can anyone please solve this? =)

thanks
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links