Molarity and Dilutions Honors

What is the molarity of a solution made from 325.4g of AlCl₃ with enough water to make 500.0 mL?

• 4.88 M
• 4.880 M
• 2.440 M
• 2.44 M

You have 286.7g of PbO. For lab, you need 2.50M PbO. How much PbO can you make?

• 0.5140mL
• 554 mL
• 514 mL
• 0.554 L

Find the molarity of 186.55 g of sugar (C₁₂H₂₂O₁₁) in 250. mL of water.

• 2.18 M
• 2.17 M
• 1.18 M
• .00218 M

Tags

NGSS.HS-PS1-5

How many grams of solute are dissolved in 125.0 mL of 5.00M NaCl?

• 0.625 g NaCl
• 36.52 g NaCl
• 36.5 g NaCl
• 0.625 mol NaCl

**Write down the equation and numbers! Write and balance the equation for a reaction between potassium bromide and calcium.

• 2KBr + Ca --> CaBr₂ + 2K
• KBr + Ca --> CaBr + K
• 2KBr + Ca --> CaBr₂ + K₂
• 3KBr + Ca --> CaBr₃ + 3K

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

What is the molarity of a solution which contains 22.41 grams of NaCl in 50.0 mL of solution?

• 0.488 M
• 7.66 M
• 7.67 M
• 0.00767 M

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.074 mol
• 62.7 mol
• 1.07 mol
• 62.7 grams

How many milliliters of solution can be made from 45.75 grams of potassium iodide if you need a solution with 2.55 M?

• 0.108 L
• 108 mL
• 0.108 mL
• 216 mL

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250. mL?

• 15.9 M
• 0.636 M
• 0.642 M
• 1.59 M

Moles per liter is the unit used for measuring

• enthalpy
• effervescence
• molarity
• molality

Tags

NGSS.HS-PS1-5