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CHEMISTRY ASSIGNMENT: Find the molarity of the following solutions:rnrn1) 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.rnrn2) 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.rnrn3) 0.5 grams of sodium chloride is dissolved to make 0.05 ml of solution.
Accepted Answer
1) 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.
Molarity = moles of solute / liters of solution
Molarity = 0.5 moles / 0.05 liters
Molarity = 10 M
2) 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.
Convert grams of sodium chloride to moles:
Moles of NaCl = 0.5 grams NaCl * (1 mole NaCl / 58.44 g NaCl)
Moles of NaCl = 0.00856 moles
Molarity = moles of solute / liters of solution
Molarity = 0.00856 moles / 0.05 liters
Molarity = 0.171 M
3) 0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution.
Convert mL to liters:
0.05 mL = 0.05 mL * (1 L / 1000 mL) = 0.00005 L
Moles of NaCl = 0.5 grams NaCl * (1 mole NaCl / 58.44 g NaCl)
Moles of NaCl = 0.00856 moles
Molarity = moles of solute / liters of solution
Molarity = 0.00856 moles / 0.00005 L
Molarity = 171.2 M
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