Quantitative Chemistry (AQA)

Mole

It is the unit used in chemistry to measure the amount of a substance

What is Avogadro’s constant?

It is equals to 6.022 × 10²³ particles.

Molar mass

It is the mass of one mole of that substance

What is balancing of chemical equation?

It involves the addition of stoichiometric coefficients to reactants and products.

Conservation of Mass

This is the principle that in a closed system, the total mass of reactants is always equal to the total mass of products in a chemical reaction

What is Molar Ratio

It is ​the ratio between the amounts in moles of any two compounds involved in a chemical reaction.

What equation will describe the relation between moles and mass?

Moles = Mass (g) / Molar Mass (g/mol)

Empirical formula

It represents the simplest whole number ratio of elements in a compound

Molecular formula

This shows the exact number of atoms of each element in a molecule

What is Concentration?

It refers to how much solute (the substance being dissolved) is present in a solution

What is the formula for concentration?

Concentration (mol/dm³) = Moles of Solute / Volume of Solution (dm³)

What is Titration?

It is a laboratory technique used to determine the concentration of a solution by reacting it with a solution of known concentration

What is the Percent Yield?

It measures the efficiency of a chemical reaction.

What is the formula of percent yield?

What is Atom Economy?

This concept measures the efficiency of a chemical reaction in terms of how much of the reactants are turned into useful products

What is the formular of Atom economy?

What is the meaning of Gas Volume?

It is the volume of carbon dioxide gas, expressed at standard conditions (0oC and 1 atmosphere of pressure) dissolved in an equal volume of liquid

What is the ideal gas law?

It relates the properties of gases (pressure, volume, temperature, and moles) in a mathematical equation

What is the formula of ideal gas law?

pV=nRTpV

What is the limitation of Ideal Gas Law?

It assumes that gases are made of particles that have no volume and experience no intermolecular forces. However, real gases have volume, and intermolecular forces do exist. These deviations become noticeable at high pressures and low temperatures.