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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Ownaginatious on June 12, 2007, 07:04:44 PM

Title: How do I answer these chemistry hydrate questions?
Post by: Ownaginatious 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?

Title: Re: How do I answer these chemistry hydrate questions?
Post by: FeLiXe 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

Title: Re: How do I answer these chemistry hydrate questions?
Post by: hmx9123 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.