Question

3. Describe in words a laboratory procedure to hydrolyze a disaccharide. -1n boiling wqter koen, Plore Gil S tor tyk, inforょ1 minute, ,.ie uonp netepen 4. Write out the chemical equation for the reaction in 3 (above). [Note: Just write the simple, balanced equation that shows the starting reactants and final products. You do not need to include intermediate steps that involve acid. See chapter 5 of your textbook.] O Frutta trp
#3 is correct but I’m unsure about #4

Answer 1

3) Laboratory procedure for hydrolysis of disaccharides:

Obtain 3 clean test tube and label them A, B & C. In test tube A and B take 2 ml of Sucrose. In test tube C take 2 ml of distilled water. In test tube A and C add 20 drops of HCl and in test tube B add 20 drops of distilled water. Keep all the 3 test tubes in a boiling water for 4 minutes. After 4 minutes take it and test the solution in all the 3 test tubes for reducing sugar. Record the results obtained and clean and replace the articles.

4)

C₁₂H₂₂O₁₁  + H₂O + H⁺ --> C₆H₁₂O_​6 + C₆H₁₂O_​6 Sucrose Glucose Fructose

Same for Maltose and Lactose. Maltose give 2 Glucose and Lactose give 1 Glucose and 1 galactose.