s_khurjekar17
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Joined: Tue Feb 19, 2013 6:53 pm
Occupation: Parent w/ Student in 6th Grade

Science Fair HELP!

Postby s_khurjekar17 » Tue Feb 19, 2013 7:01 pm

I am doing: Sucrose & Glucose & Fructose, Oh My! Uncovering Hidden Sugar in Your Food and I cannot figure how to determine/calculate the original sucrose concentration and/or the percent of sucrose converted! HELP!!!! This is due TOMORROW! :?:

Limeybean
Former Expert
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Re: Science Fair HELP!

Postby Limeybean » Tue Feb 19, 2013 9:56 pm

Hi s_khurjekar17,

Sucrose & Glucose & Fructose, Oh My! Uncovering Hidden Sugar in Your Food is a great project. So you started the experiment with a 10% sucrose solution (6 g sucrose / 60 ml water), but it might be easier to think about it as a decimal (0.10).

If you change your concentrations of sugars to decimals and then use the equation below it might make more sense.

Original sucrose concentration × Glucose concentration at linear time point = Percentage of sucrose converted

Good luck,
Emily

s_khurjekar17
Posts: 4
Joined: Tue Feb 19, 2013 6:53 pm
Occupation: Parent w/ Student in 6th Grade

Re: Science Fair HELP!

Postby s_khurjekar17 » Sun Feb 24, 2013 9:16 am

Thank you, but I still have one question, about how much is a normal amount of original sucrose concentration for a liquid just to give an estimate? And also, to find out the percentage of sucrose converted, do you just do the reading after invertase subtracted by the reading before invertase?

Thanks Emily :)

Limeybean
Former Expert
Posts: 26
Joined: Mon Nov 19, 2012 4:38 pm
Occupation: Graduate student

Re: Science Fair HELP!

Postby Limeybean » Tue Feb 26, 2013 10:26 pm

Hi s_khurjekar17,

It sounds like you are on the right track. If you know the concentration of glucose before and after adding intertase, than you should be able to rearrange the equation and get the original sucrose concentration.

Cheers,
Emily

s_khurjekar17
Posts: 4
Joined: Tue Feb 19, 2013 6:53 pm
Occupation: Parent w/ Student in 6th Grade

Re: Science Fair HELP!

Postby s_khurjekar17 » Wed Feb 27, 2013 5:34 pm

But what is the amount of sucrose converted then?


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