is highly hygroscopic, anhydrous calcium chloride is often used as a dessicant t
ID: 563705 • Letter: I
Question
is highly hygroscopic, anhydrous calcium chloride is often used as a dessicant to absorb water from the air. How many grams of water can be absorbed by 250. g of anhydrous calcium chloride? 2 Calcium chloride absorbs water from the air to form calcium chloride dihydrate. Because it 3. The mass % of water in a saturated glucose solution is 52.38%. The density of the solution is 1.23 g/mL. a. What are the mole fractions of water and glucose in this solution? b. What is the molarity of the solution? c. What is the molality of the solution? BONUS: Glucose is a non-ionizing, non-volatile solute. What is the vapor pressure of water above this solution? d.Explanation / Answer
2) 1 mole of CaCl2 absorbs 2 moles of H2O from air
110 g of CaCl2 absorbs 36 g H2O from air
250 g of CaCl2 absorbs (250 g CaCl2 * 36 g H2O) / 110 g CaCl2 = 81.8 g H2O
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