Periodic Table & Bonding
Moles & Stoichiometry
Gases & Gas Laws
Solutions & Concentrations
Acids, Bases & Reactions
100

These are the vertical columns of the periodic table.

What are groups?

100

The number of particles in one mole of a substance.

What is 6.02 × 10²³ (Avogadro’s number)?

100

The unit used for pressure in the ideal gas law equation.

What is kPa (or Pa)?

100

The unit commonly used for concentration in chemistry.

What is mol/L (molarity)?

100

The pH of a neutral solution at 25 °C.

What is 7?

200

Atoms of the same element with different numbers of neutrons are called this.

What are isotopes?

200

Calculate the molar mass of calcium carbonate (CaCO₃).

What is 100 g/mol?

200

This law states that volume and temperature are directly proportional at constant pressure.

What is Charles’ Law?

200

Calculate the concentration of a solution containing 0.50 mol of NaCl dissolved in 1.0 L of water.

What is 0.50 M?

200

An acid that donates only one hydrogen ion per molecule.

What is a monoprotic acid?

300

The type of bonding between sodium and chlorine atoms in NaCl.

What is ionic bonding?

300

How many moles are in 18 g of water (H₂O, M = 18 g/mol)?

What is 1 mole?

300

Calculate the volume at STP of 0.25 moles of oxygen gas.

What is 5.6 L?

300

How many moles of solute are present in 250 mL of 2.0 M HCl solution?

What is 0.50 mol?

300

Write the balanced equation for the reaction between HCl and NaOH.

What is HCl + NaOH → NaCl + H₂O?

400

Draw the Lewis structure for water (H₂O) and name the shape.

What is bent (V-shaped)?

400

In the reaction 2 H₂ + O₂ → 2 H₂O, how many moles of O₂ are required to react with 6 moles of H₂?

What is 3 moles?

400

A gas at 300 K and 100 kPa occupies 2.0 L. What will its volume be at 600 K and the same pressure?

What is 4.0 L?

400

A solution is made by dissolving 25 g of NaOH (M = 40 g/mol) in 500 mL of water. Calculate the concentration.

What is 1.25 M?

400

Calculate the pH of a 0.010 M HCl solution.

What is pH = 2?

500

Explain why graphite conducts electricity but diamond does not.

graphite has delocalised electrons between layers; diamond does not

500

Calculate the mass of CO₂ produced when 10 g of C₂H₆ undergoes complete combustion.

What is 29.3 g CO₂?

500

Use PV = nRT to calculate the number of moles in a 5.00 L container of nitrogen gas at 25 °C and 100 kPa (R = 8.31 J/mol·K).

What is 0.20 mol?

500

A 2.0 M solution of NaOH is diluted to make 500 mL of 0.50 M solution. What volume of the original solution was used?

What is 125 mL?

500

Explain why a weak acid, like ethanoic acid, has a higher pH than a strong acid of the same concentration.

because it only partially ionises in solution

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