0DD ations Assessments Resources Awards 3B (Solution Concentrations) rtney Carne

Question

0DD ations Assessments Resources Awards 3B (Solution Concentrations) rtney Carnes: Attempt 1 What is the molarity of an intravenous glucose solution prepared from 108 g of glucose in 2.0L of solution? 0.018 mol/L 0.30 mol/L 0.60 mol/L 2.2 x 102 mol/L Save Question 3 (0.5 points) A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How many grams of Naci are contained in 250 mL of this solution? 0.0037 g NaCI 0.92 g NaC 2.3gNacl MacBook A

Explanation / Answer

1. Molarity(M): Moles of solute upon Volume of solution in Litres.

moles of glucose = 108/180 = 0.6

Molarity = 0.6/2 mol/L = 0.3 mol/L

2. 0.92% w/v means 0.92 gram of NaCl is present in 100 mL solution.

therefore, 1 mL solution contains 0.92/100 gram NaCl. (Unitary method)

250 mL solution contains (0.92/100) x 250 gram of NaCl.

therefore, answer is 2.3 g.

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