Parts per Million to Percentage: Conversion Quiz and Flashcards

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the unit of molarity?

mol L^–1 (correct)

M (molar)

mol kg^–1

g/mol

How is molality defined?

Number of moles of solvent per 1000 g or 1 kg of solute

Number of moles of solute per 1000 g or 1 kg of solvent (correct)

Number of moles of solute per mole of solvent

Number of moles of solute per litre of solution

Which property does not change with temperature according to the text?

Mole fraction (correct)

Molality

Normality

Mass percentage

What is the unit of molality?

mol kg^–1 Signup and view all the answers

How is mass percentage calculated?

(mass of solute / total mass) x 100% Signup and view all the answers

What is the formula for calculating mass percentage of a solute in a solution?

Mass of solute in the solution × 100 / Total mass of the solution Signup and view all the answers

Which percentage is commonly used in medicine and pharmacy?

Mass by volume percentage of a solute Signup and view all the answers

How is parts per million (ppm) defined?

Parts of a component per million parts of the solution Signup and view all the answers

Which type of ppm expresses the concentration by relating the mass of a component to the total mass of the solution?

Mass to mass ppm Signup and view all the answers

What is the formula for calculating mole fraction?

(Number of moles of a specific component) / Total number of moles Signup and view all the answers

What does the sum of mole fractions of all components in a solution always add up to?

1 Signup and view all the answers

What is the formula for calculating mole fraction of a component?

x = Number of moles of the component / Total number of moles of all the components Signup and view all the answers

Which formula is used to calculate Molarity (M)?

M = Number of moles of solute / Volume of solution in Litre Signup and view all the answers

What does Normality (N) represent in a solution?

Number of gram equivalents of solute per liter of solution Signup and view all the answers

How is Mass Percentage calculated in a solution?

Mass percentage = Mass of solute / Total mass of the solution Signup and view all the answers

What is the relationship between Molarity (M) and Molality (m)?

M = Molar mass × 1000 / Molality Signup and view all the answers

How is Molality (m) related to Mole fraction of solute (χB)?

$m= χ B × 1000 / (1 − χ B ) × M A$ Signup and view all the answers

Study Notes

Concentration of Solutions

W% (Mass percentage) is defined as the mass of solute in the solution per 100 g of the solution.
W% = (Mass of solute in the solution × 100) / Total mass of the solution

Volume Percentage

V% (Volume percentage) is defined as the volume of solute dissolved per 100 mL of solution.
V% = (Volume of solute × 100) / Total volume of the solution

Mass by Volume Percentage

w% (Mass by volume percentage) is defined as the mass of solute dissolved per 100 mL of solution.
w% = (Mass of solute × 100) / Volume of solution

Parts Per Million (ppm)

ppm is defined as the parts of a component per million (10^6) parts of the solution.
ppm can be expressed in three ways: mass to mass, volume to volume, and mass to volume.

Mole Fraction

Mole fraction is the ratio of the number of moles of a particular component to the total number of moles of all the components.
χA = nA / (nA + nB), where nA is the number of moles of component A and nB is the number of moles of component B.

Key Formulae

Mole fraction of a component = x1 = n1 / (n1 + n2)
Molarity (M) = Number of moles of solute / Volume of solution in Litre
Molality (m) = Number of moles of solute / Mass of solvent in kg
Normality (N) = Number of gram equivalents of solute / Volume of solution in Litre

Relationships between Concentration Terms

Relationship between Molarity (M) and Molality (m): dM / (1 - B) = M / 1000m
Relationship between Mole fraction of solute (χB) and Molality (m): m = χB × 1000 / (1 - χB) × MA

Molarity and Molality

Molarity (M) is defined as the number of moles of solute per litre of solution.
M = WB × 1000 / MB × V
Unit of Molarity is mol L^-1 or M (molar).
Molality (m) is defined as the number of moles of solute per 1000 g or 1 kg of solvent.
m = WB × 1000 / MB × W
Unit of Molality is mol kg^-1 or molal (m).

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Learn how to calculate the mass percentage, volume percentage, mass by volume percentage, and parts per million in solutions. These are common methods used in chemistry, medicine, and pharmacy to express the concentration of a solute in a solution.