Concentration: Molarity & PercentLab

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Concentration basics and problems

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Estefanía Carrasco

Ecuador

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Froggy Jumps Concentration: Molarity & PercentLabVersión en línea Concentration basics and problems por Estefanía Carrasco 1 What is molarity (M) a measure of in a solution? a moles of solute per liter of solution b percent by volume of solute in solvent c grams of solute per liter of solution 2 Choose the correct unit for molarity. a mol per liter (mol/L) b g/L c mol/g 3 A 1.0 M solution contains how many moles of solute per liter? a 10 moles b 0.1 mole c 1 mole of solute 4 If 2.0 moles of NaCl are dissolved to make 2.0 L of solution, what is the molarity? a 1.0 M b 2.0 M c 0.5 M 5 What does % w/w denote in solutions? a volume percentage b mass percentage by mass c molar percentage 6 If 50 g of solute is dissolved in 500 g of solution, the mass percent is? a 10% w/w b 5% w/w c 50% w/w 7 How do you convert from mass percent to molarity? a use density to convert mass to volume and calculate moles b divide percent by 10 c ignore density and use grams 8 A 0.250 M solution has 0.250 moles per liter. What is its volume if you have 0.500 moles? a 1.00 L b 0.125 L c 2.00 L 9 What is the percent concentration by volume (v/v) used for liquids? a mass per mass b moles per liter c volume of solute per total volume, times 100

Froggy Jumps

Concentration: Molarity & PercentLabVersión en línea

Concentration basics and problems

por Estefanía Carrasco

What is molarity (M) a measure of in a solution?

moles of solute per liter of solution

percent by volume of solute in solvent

grams of solute per liter of solution

Choose the correct unit for molarity.

mol per liter (mol/L)

g/L

mol/g

A 1.0 M solution contains how many moles of solute per liter?

10 moles

0.1 mole

1 mole of solute

If 2.0 moles of NaCl are dissolved to make 2.0 L of solution, what is the molarity?

1.0 M

2.0 M

0.5 M

What does % w/w denote in solutions?

volume percentage

mass percentage by mass

molar percentage

If 50 g of solute is dissolved in 500 g of solution, the mass percent is?

10% w/w

5% w/w

50% w/w

How do you convert from mass percent to molarity?

use density to convert mass to volume and calculate moles

divide percent by 10

ignore density and use grams

A 0.250 M solution has 0.250 moles per liter. What is its volume if you have 0.500 moles?

1.00 L

0.125 L

2.00 L

What is the percent concentration by volume (v/v) used for liquids?

mass per mass

moles per liter

volume of solute per total volume, times 100

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Concentration: Molarity & PercentLab

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Concentration: Molarity & PercentLabVersión en línea

por Estefanía Carrasco

What is molarity (M) a measure of in a solution?

Choose the correct unit for molarity.

A 1.0 M solution contains how many moles of solute per liter?

If 2.0 moles of NaCl are dissolved to make 2.0 L of solution, what is the molarity?

What does % w/w denote in solutions?

If 50 g of solute is dissolved in 500 g of solution, the mass percent is?

How do you convert from mass percent to molarity?

A 0.250 M solution has 0.250 moles per liter. What is its volume if you have 0.500 moles?

What is the percent concentration by volume (v/v) used for liquids?

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