| Hamble Ref | HT ONLY | Sep ONLY | Student Checklist Question | 1 | 2 | 3 |
|---|---|---|---|---|---|---|
| C1.5.01 | What is the law of the conservation of mass? | |||||
| C1.5.01 | Why must we ensure that chemical equations are balanced? | |||||
| C1.5.01 | What do the multipliers in normal script before a chemical formula represent? Eg 2MgO | |||||
| C1.5.02 | How do we calculate the relative formula mass (Mr) of a compound? | |||||
| C1.5.02 | Why must the total relative formula mass of all of the reactants equal that of all of the products made? | |||||
| C1.5.03 | When a gas is produced in a chemical reaction, why would the mass of the products appear to be less than that of the reactants? | |||||
| C1.5.03 | Explain why in the reaction below the mass of the products would be greater than that of the reactants 2Mg (s) O2 (g) -> 2MgO (s) |
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| C1.5.03 | What does the term uncertainty mean? | |||||
| C1.5.03 | How would you represent the distrubtion of results to make estimations of uncertainty? | |||||
| C1.5.03 | A pippette has an uncertainty of /-0.01mL. It is used three times in a practical. What is the mean measure of uncertainty? | |||||
| C1.5.04 | ★ | (HT only) Chemical amounts are measured in moles. What is the symbol of the unit for moles? | ||||
| C1.5.04 | ★ | (HT only)How can we calculate the mass of one mole of a substance? | ||||
| C1.5.04 | ★ | (HT only)If you have one mole each of two different substances, what will they share in common? | ||||
| C1.5.04 | ★ | (HT only)What does Avogadro's constant represent? | ||||
| C1.5.04 | ★ | (HT only)What is the value of Avogadro's constant? | ||||
| C1.5.04 | ★ | (HT only)Would there be any difference in the number of atoms in one mole of carbon (C) compared with the number of one mole of molecules of carbon dioxide (CO2)? | ||||
| C1.5.04 | ★ | (HT only)Calculate the mass of one mole of C2H6 | ||||
| C1.5.05 | What units are used for the measurement of concentration of a solution? | |||||
| C1.5.05 | What is the concentration of a solution that has 37g of solute dissolved in 100cm3? Give your answer in dm3. | |||||
| C1.5.05 | ★ | (HT only) What is the equation that relates the mass of a solute, the volume of a solution and the concentration of the solution? | ||||
| C1.5.05 | Why industrially is high atom economy important? | |||||
| C1.5.06 | ★ | (HT only)Balance the equation and calculate the mass of the reactants and products of the balanced symbol equation: H2O2 --> H20 02 |
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| C1.5.06 | ★ | (HT only)In the following equation: Mg 2HCI --> MgCI2 H2 What is the ratio of magnesium (Mg) atoms react in comparison to that of hydrochloric acid (HCl)? |
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| C1.5.06 | ★ | (HT only)CaCO3 2HCl ---> CaCl2 CO2 H2O Use the above equation to determine the mass of carbon dioxide produced if you react 10g of calcium carbonate with an excess of hydrochloric acid? |
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| C1.5.06 | ★ | (HT only)Calculate the mass of iron produced when 32g of iron (III) oxide is completely reduced by aluminium. The reaction is shown in the symbol equation: Fe2O3 2Al ? 2Fe Al2O3 |
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| C1.5.06 | ★ | (HT only)How can you use the massess of reactants and products to balance a symbol equation? | ||||
| C1.5.06 | ★ | (HT only) Reactants Sb = 488g Cl2 = 426g Products SbCl3= 914g Complete a symbol equation for the reaction above using the masses to balance the equation. |
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| C1.5.06 | ★ | (HT only)How do you rearrange the moles equation to find the relative formulat mass? Moles = mass / RFM | ||||
| C1.5.07 | ★ | (HT only)What is meant when a reactant is said to be in excess? | ||||
| C1.5.07 | What is meant when a reactant is described as a limiting reactant? | |||||
| C1.5.07 | ★ | (HT only) 2H2 O2 --> 2H2O You react 10g of oxygen with 10g of hydrogen. Only 11.25g of product is made the rest of the reactants remain unused. Suggest why the full mass of reactants did not react. What is the leftover unreacted substance? |