Multiple Choice
What is the molarity of a solution containing 2.8 mol of LiCl in a volume of 5.00 \(\times\) 10^2 mL?
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6. Chemical Quantities & Aqueous Reactions
Molarity
Multiple Choice
How many grams of sodium chloride (NaCl) are required to prepare 500.0 mL of a 0.100 M solution?
A
5.85 g
B
2.92 g
C
1.00 g
D
0.50 g
Verified step by step guidance1
Identify the given information: volume of solution = 500.0 mL, molarity (M) = 0.100 mol/L, and the solute is sodium chloride (NaCl).
Convert the volume from milliliters to liters because molarity is expressed in moles per liter: \(\text{Volume (L)} = \frac{500.0\ \text{mL}}{1000}\).
Use the molarity definition to find the number of moles of NaCl needed: \(\text{moles} = M \times \text{Volume (L)}\).
Calculate the molar mass of NaCl by adding the atomic masses of sodium (Na) and chlorine (Cl): \(\text{Molar mass of NaCl} = \text{atomic mass of Na} + \text{atomic mass of Cl}\).
Convert moles of NaCl to grams using the molar mass: \(\text{mass (g)} = \text{moles} \times \text{molar mass (g/mol)}\).
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