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Topic: How much KHC8H4O4 needed to make 0.1mol/L solution?  (Read 8235 times)

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Offline tees

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How much KHC8H4O4 needed to make 0.1mol/L solution?
« on: January 27, 2009, 07:13:54 PM »
1.How much KHC8H4O4 (in grams) is needed to prepare 100 mL of a 0,100 mol/L (concentration) KHC8H4O4 solution ?

« Last Edit: January 27, 2009, 07:35:38 PM by geodome »
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Offline ARGOS++

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Re: Need Help PLZ
« Reply #1 on: January 27, 2009, 07:18:58 PM »
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Offline Donaldson Tan

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Re: Need Help PLZ
« Reply #2 on: January 27, 2009, 07:34:50 PM »
How much moles of KHC8H4O4  in 100ml of 0.1mol/L solution?

In future, do not use topic titles such as "Need Help", "Help Please" as they do not describe the problem, but your anxiety.

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Offline tees

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Re: How much KHC8H4O4 needed to make 0.1mol/L solution?
« Reply #3 on: January 27, 2009, 07:49:48 PM »
oops i am sorry for the rules thingy..

i want to know how much grams of that KHC thing is need to prepare 100 mL of a solution that has a concentration of 0,100 mol/L
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Offline macman104

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Re: How much KHC8H4O4 needed to make 0.1mol/L solution?
« Reply #4 on: January 27, 2009, 08:04:29 PM »
Quote from: tees on January 27, 2009, 07:49:48 PM
oops i am sorry for the rules thingy..

i want to know how much grams of that KHC thing is need to prepare 100 mL of a solution that has a concentration of 0,100 mol/L
Yes, we understand.  The rules say that you need to show some work first.  Can you figure out how many moles are in 100 mL if you have a 0,100 mol/L solution?
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Offline TheJoker

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Re: How much KHC8H4O4 needed to make 0.1mol/L solution?
« Reply #5 on: January 27, 2009, 10:53:44 PM »
so just find the moles needed to prepare 100 ml of a .1 M solution:

100 mL = .1 L (.1 mol/ 1L) .01 mol of KHC8H4O4

and then use the molar mass of this compound to find the grams needed.
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