Periodic Table & Bonding
These are the vertical columns of the periodic table.
What are groups?
The number of particles in one mole of a substance.
What is 6.02 × 10²³ (Avogadro’s number)?
The unit used for pressure in the ideal gas law equation.
What is kPa (or Pa)?
The unit commonly used for concentration in chemistry.
What is mol/L (molarity)?
The pH of a neutral solution at 25 °C.
What is 7?
Atoms of the same element with different numbers of neutrons are called this.
What are isotopes?
Calculate the molar mass of calcium carbonate (CaCO₃).
What is 100 g/mol?
This law states that volume and temperature are directly proportional at constant pressure.
What is Charles’ Law?
Calculate the concentration of a solution containing 0.50 mol of NaCl dissolved in 1.0 L of water.
What is 0.50 M?
An acid that donates only one hydrogen ion per molecule.
What is a monoprotic acid?
The type of bonding between sodium and chlorine atoms in NaCl.
What is ionic bonding?
How many moles are in 18 g of water (H₂O, M = 18 g/mol)?
What is 1 mole?
Calculate the volume at STP of 0.25 moles of oxygen gas.
What is 5.6 L?
How many moles of solute are present in 250 mL of 2.0 M HCl solution?
What is 0.50 mol?
Write the balanced equation for the reaction between HCl and NaOH.
What is HCl + NaOH → NaCl + H₂O?
Draw the Lewis structure for water (H₂O) and name the shape.
What is bent (V-shaped)?
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?
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?
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?
Calculate the pH of a 0.010 M HCl solution.
What is pH = 2?
Explain why graphite conducts electricity but diamond does not.
graphite has delocalised electrons between layers; diamond does not
Calculate the mass of CO₂ produced when 10 g of C₂H₆ undergoes complete combustion.
What is 29.3 g CO₂?
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?
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?
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