Quantitative Chemistry:

• State that mass is conserved and explain why, including describing balanced equations in terms of conservation of mass
• Explain the use of the multipliers in equations in normal script before a formula and in subscript within a formula
• Describe what the relative formula mass (Mr) of a compound is and calculate the relative formula mass of a compound, given its formula
• Calculate the relative formula masses of reactants and products to prove that mass is conserved in a balanced chemical equation
• Explain observed changes of mass during chemical reactions in non-enclosed systems using the particle model when given the balanced symbol equation
• Explain why whenever a measurement is made there is always some uncertainty about the result obtained
• State that chemical amounts are measured in moles (mol) and explain what a mol is with reference to relative formula mass and Avogadro's constant
• Use the relative formula mass of a substance to calculate the number of moles in a given mass of the substance
• Calculate the masses of reactants and products when given a balanced symbol equation
• Use moles to write a balanced equation when given the masses of reactants and products
• Explain the effect of limiting the quantity of a reactant on the amount of products in terms of moles or masses in grams
• Calculate the mass of solute in a given volume of solution of known concentration in terms of mass per given volume of solution
• Explain how the mass of a solute and the volume of a solution is related to the concentration of the solution