March 28, 2024, 06:26:04 PM
Forum Rules: Read This Before Posting


Topic: How do I answer these chemistry hydrate questions?  (Read 3657 times)

0 Members and 1 Guest are viewing this topic.

Offline Ownaginatious

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
How do I answer these chemistry hydrate questions?
« on: June 12, 2007, 07:04:44 PM »
Since it is getting close to the end of the school year, my teacher has decided to teach really fast :p We started learning about hydrates, and I don't really know if I'm doing the homework right or not because he never gives answers, or takes anything up.

Can someone please walk me through these two questions, and tell me what you get as your answer?

15) What is the volume of water used to make up a 5% by mass solution of sodium acetate when 20 grams of sodium acetate trihydrate is used?

16) How would you prepare 250 mL of 0.100 M barium chloride solution from solid barium chloride dihydrate?

Offline FeLiXe

  • Theoretical Biochemist
  • Chemist
  • Full Member
  • *
  • Posts: 462
  • Mole Snacks: +34/-7
  • Gender: Male
  • Excited?
    • Chemical Quantum Images
Re: How do I answer these chemistry hydrate questions?
« Reply #1 on: June 14, 2007, 05:16:23 PM »
15)how many g sodium acetate without water -> 5%; add 95% water

16)molar weight of BaCl2*(H2O)2
how many moles? -> weigh in
fill up to 250mL
Math and alcohol don't mix, so... please, don't drink and derive!

Offline hmx9123

  • Retired Staff
  • Full Member
  • *
  • Posts: 897
  • Mole Snacks: +59/-18
Re: How do I answer these chemistry hydrate questions?
« Reply #2 on: June 16, 2007, 02:24:22 PM »
Show us the work that you have done thus far, and you're much more likely to get detailed help.

Sponsored Links