# A level chemistry question help pls

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#1
Hey guys,

Got this 6 Mark question from my teacher could someone please help me and explain how to do it because I can’t get my head around it!

Q: Describe how you would make 250cm^3 of a solution of butanedioc acid with am accurately known concentration of approx. 0.0500 mol dm^3. Butanedioic acid is soluble in sufficiently soluble in water to get this concentration?
Molar Mass of Butanedioic acid is 118g mol-1

Thanks for your time guys I appreciate it a lot
0
2 years ago
#2
(Original post by z20010318)
Hey guys,

Got this 6 Mark question from my teacher could someone please help me and explain how to do it because I can’t get my head around it!

Q: Describe how you would make 250cm^3 of a solution of butanedioc acid with am accurately known concentration of approx. 0.0500 mol dm^3. Butanedioic acid is soluble in sufficiently soluble in water to get this concentration?
Molar Mass of Butanedioic acid is 118g mol-1

Thanks for your time guys I appreciate it a lot
calculate moles of acid needed from molarity x volume (litres)
weigh it out
make up to 250ml in a volumetric flask
0
1 month ago
#3
Hello there,
I know I'm 2 years late but I just got set this same question as homework and I just wanted to confirm my calculations were correct:

250÷1000=0.25 mol dm-3
0.050 X 118=5.9 g dm-3

5.9 X 0.25=1.475 grams

Dissolve 1.475 grams of Butanedioic acid in 250cm3 of water.
(Original post by z20010318)
Hey guys,

Got this 6 Mark question from my teacher could someone please help me and explain how to do it because I can’t get my head around it!

Q: Describe how you would make 250cm^3 of a solution of butanedioc acid with am accurately known concentration of approx. 0.0500 mol dm^3. Butanedioic acid is soluble in sufficiently soluble in water to get this concentration?
Molar Mass of Butanedioic acid is 118g mol-1

Thanks for your time guys I appreciate it a lot
Last edited by mathieua0001; 1 month ago
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