Analysis of Sweets. Is it possible to find any of the substances(Starch,Gelatin, Sucrose/Glucose) in any of the different candy samples?

IB Chemistry: Analysis of Sweets

IB

Name: klassa andersen

16/9-11

Design:

Aim: Is it possible to find any of the substances(Starch,Gelatin, Sucrose/Glucose) in any of the different candy samples?

Variables: None

Independent variable: None

Controlled variable: None

Dependant variable: None

Materials:

• Heater
• Copper Sulfate (CuSO4 )(0,1M)
• Sodium Hydroxide (NaOH) (2 M)
• Beaker (25 ml)
• Waterglass
• Three different Candy samples(2: Gumdrops,4:Cola Straps,9:Winegum)
• Iodide
• Water (H2O)

Method:

1. Cut the three different samples of candy into small pieces
2. Put small pieces of the different samples of the candies into three watchglasses
3. Put small amounts of H2O into the three watchglasses
4. Put small amounts of iodide into the three different samples containing small amounts of H2O
5. If the samples turn black then Starch can found in the samples of Candy.
6. To Find if there is any gelatin in any of the three samples of candy, you first cut the three different samples of candy into small pieces
7.  Put the three different samples into three different beakers
8. Add small amounts of CuSO4 and then NaOH
9. Check to see if the samples have a purple color which means that the sample of the candy contains gelatin
10. To find out if the any of the three different samples of candy contain any Sucrose/glucose you put the samples containing gelatin into a heater
11. If any of the three different samples have a yellowish color, then the contain Sucrose/glucose.