Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. 68 Principles of Food Science Lab Manual Name ________________________________________________________________ Date ________________________ Period _______________ Activity B Calculating Molarity Round atomic masses to the nearest whole number before calculating molarity in each of the following problems. Show your work. 1. The Recommended Dietary Allowance for vitamin C for 14- to 18-year-old males is 75 mg. Calculate how many moles this is of ascorbic acid (C 6 H 8 O 6 ). 2. The Daily Value for sodium is a maximum of 2,300 mg (2.3 g) per day. If you consumed this maximum every day, calculate how many days it would take to consume 1 mole of sodium. 3. Baking powder must contain 1 mole of potassium bitartrate (KNaC 4 H 4 O 6 ) for every mole of sodium bicarbonate (NaHCO 3 ). If you have 1 mole of NaHCO 3 , calculate how many grams of KNaC 4 H 4 O 6 you will need. 4. Calculate how many grams of NaOH you should mass to make 500 mL of a 1 molar solution. 5. Calculate how many grams of CaCl 2 you need to make 100 mL of a 2 molar solution. 6. One part of glucose (C 6 H 12 O 6 ) is combined with six parts of oxygen (O 2 ) to produce energy. Calculate how many grams of C 6 H 12 O 6 are needed to react with 64 g of O 2 . (Hint: Begin by calculating how many moles of oxygen you have.)