Molarity and Percent By Mass

The ___ is the part of the solution being dissolved

• solute

• solvent

What is the concentration, in percent by mass, of 0.62 g of solute in 45.0 g of solution?

• 0.014 %

• 1.4 %

• 0.13%

What mass of solute is needed to make 100.0 g of a 3.4% solution?

• 3.4 g

• 34 g

• 2941 g

• 0.34 g

Tags

NGSS.HS-PS1-7

___________ refers to the amount of solute dissolved in a given amount per volume of solution

• Concentration

• Dilution

• Precipitation

• None of the above

Tags

NGSS.HS-PS1-5

What is the percent by mass of a solution made by dissolving 10.0 g of NaCl into 180.0 g of water?

• 5.26 %

• 5.56 %

• 180.0 %

• 20.0 %

What is the molarity of a solution containing 4 moles of KCl in 2.5 L of solution?

• 1.6 M

• 0.63 M

• 10 M

• 2.6 M

What volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl?

• 4.9 L

• 0.20 L

• 1.2 L

How many moles of NaCl are needed to make 5.25 L of a 0.25 M solution?

• 1.3 mol

• 21 mol

• 0.048 mol

What is the molarity of a solution containing 4.26 g of KCl in 1.25 L of solution? *Change g to mol first, molar mass of KCl = 74.55 g/mol*

• 3.41 M

• 0.0457 M

• 0.0571 M

• 0.0714 M

Tags

NGSS.HS-PS1-7

How many grams of KCl would be dissolved in 5.50 L of a 0.250 M solution of KCl? *molar mass of KCl = 74.55 g/mol*

• 1.48 g

• 103 g

• 1640 g

• 3.39 g

Tags

NGSS.HS-PS1-7