Calculate the mass of potassium acid phthalate (HKC8H4O4) that will require about 15 mL of the approximately 0.1 M NaOH solution. Measure approximately this mass on a tared piece of weighing paper and transfer it to a clean, labeled Erlenmeyer flask. Similarly, prepare all three samples, recording the masses for each. Dissolve the KHP in about 50 mL of R. O. water and add 2 drops of phenolphthalein.

0.31 g

Explanation:

The equation of the reaction;

HKC8H4O4(aq) + NaOH(aq) > Na(KC8H4O4)(aq) + H2O(l)

Number of moles of NaOH = 15/1000 L × 0.1 M

= 0.0015 moles

Since the reaction is 1:1, 0.0015 moles of KHP reacted;

Number of moles of KHP = mass of KHP reacted/molar mass of KHP

Mass of KHP = Number of moles of KHP × molar mass of KHP

Mass of KHP = 0.0015 moles × 204.22 g/mol

Mass of KHP = 0.31 g

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

1 is the answer to this problem