Need help with molarity problems

Chemistry
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5. What percent solution is 100ml of a 0.8M solution of sucrose?

6. How would I make a liter of a 10% solution of sucrose?

7. What molarity is 100ml of a 10% solution of sucrose?

8. What percent solution of sucrose would I have to make to have an equal concentration of a 10% solution of glucose?

Aug 27th, 2015

Thank you for the opportunity to help you with your question!

5. What percent solution is 100ml of a 0.8M solution of sucrose?

moles in 100ml = 100/1000* 0.8 = 0.08 moles

mass = 0.08* 342.3 =27.384g

volume percent =weight in grams/volume *100%

volume percent  27.384/100 * 100%= 27.384%

6. How would I make a liter of a 10% solution of sucrose?

this means 10g of water in 100 ml solution . add10g in 100ml water

7.What molarity is 100ml of a 10% solution of sucrose?

10g in 100 ml

moles = 10g/342.3 = 0.029moles in 100 ml

in 1000ml = 1000/100 *0.029 = 0.29M

8 10% GLUCOSE

10G IN 100ML  MOLES = 10/ 180.16 =0.0555MOLES

MOLES OF SUCROSE WOULD BE 0.0555MOLES

MASS = 0.0555*342.3= 18.999 =19G IN 100 ML

= 19% SOLUTION

Please let me know if you need any clarification. I'm always happy to answer your questions.
Aug 27th, 2015

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