Answer Happy

Due soon, Please help with 2D and number 6. Would really
appreciate it !
2. Casein has an excess of amino acids with acidic R-groups like aspartic acid. Complete the reactions below for aspartic acid. a) H₂N. НО. som OH excess acetic acid b) HN OH excess NaOH HO Hoy c) OH HNO pH 7.4 OH d) Explain why the casein precipitates when we add excess acetic acid. 6. Which of the following changes when a catalyst is added to a reaction? EA ΔΗ reaction rate