LAB 3 (Chem aspect of life)

Organic compound- sugar, meat, unknown

• molecules contain carbon in the form of chains or ring

• molecules does not contain carbon in the form of chains or ring

Inorganic compound- salt, baking soda

• molecules contain carbon in the form of chains or ring

• molecules does not contain carbon in the form of chains or ring

Test for organic and inorganic components- deposits a black residue

• Organic

• Inorganic

Benedicts reagent (copper in alkaline solution) test for

• Reducing sugars

• Starch

• Protein

• Lipids

Iodine test for

• Reducing sugars

• Starch

• Protein

• Lipids

Sudan Stain Test, test for

• Reducing sugars

• Starch

• Protein

• Lipids

Biuret Reagent (sodium hydroxide, potassium hydroxide, copper sulfate) test for

• Reducing sugars

• Starch

• Protein

• Lipids

Positive for Reducing sugars?

• Blue

  (water, starch, HCl -control)

• Green, Red, or Brown

  (glucose, milk, apple juice, sucrose, HCl + sucrose)

Negative for Reducing sugars?

• Blue

  (water, starch, HCl -control)

• Green, Red, or Brown

  (glucose, milk, apple juice, sucrose, HCl + sucrose)

Positive for Starch?

• Blue-Black, Violet

  (potatoes, bread)

• Yellow

  (glucose, water, sucrose, cellulose, starch-saliva)