opportunities and resources Reference to past questions that indicate success 4.8.3.1 Flame tests can be used to Identify species from the 1 Describe the flame tests for Carry out flame tests on the Video clip identify some metal ions results of the tests in identifying cations to following cations: YouTube: (cations). Lithium, sodium, 8.3a to 8.3e. another student. lithium potassium, calcium and sodium copper compounds produce colours of other Research how firework potassium distinctive colours in flame metal ions are not manufacturers produce the calcium tests: required knowledge. different colours in copper. fireworks. lithium compounds result WS 2.2 AT 8 in a crimson flame sodium compounds result in a yellow flame potassium compounds result in a flame calcium compounds result in an orange-red copper compounds result in a green flame. If a sample containing a mixture of ions is used, some flame colours can be masked. 4.8.3.2 Sodium hydroxide solution Be able to write 2 Describe how sodium Use sodium hydroxide to can be used to identify some balanced equations for hydroxide can be used to test for the following cations: metal ions (cations). the reactions to produce identify some cations to aluminium the insoluble another student. calcium Solutions of aluminium, hydroxides. magnesium calcium and magnesium ions copper(ll) form white precipitates when Students are not iron(ll) sodium hydroxide solution is expected to write iron(lll). added but only the aluminium equations for the AT8 hydroxide precipitate
opportunities and resources Reference to past questions that indicate success 4.8.3.1 Flame tests can be used to identify some metal ions (cations). Lithium, sodium, potassium, calcium and copper compounds produce distinctive colours in flame tests: lithium compounds result in a crimson flame sodium compounds result in a yellow flame potassium compounds result in a flame calcium compounds result in an orange-red copper compounds result in a green flame. If a sample containing a mixture of ions is used, some flame colours can be masked. Identify species from the results of the tests in 8.3a to 8.3e. colours of other metal ions are not required knowledge. WS 2.2 1 Describe the flame tests for identifying cations to another student. Research how firework manufacturers produce the different colours in fireworks. Carry out flame tests on the following cations: lithium sodium potassium calcium copper. AT 8 Video clip YouTube: 4.8.3.2 Sodium hydroxide solution can be used to identify some metal ions (cations). Solutions of aluminium, calcium and magnesium ions form white precipitates when sodium hydroxide solution is added but only the aluminium hydroxide precipitate Be able to write balanced equations for the reactions to produce the insoluble hydroxides. Students are not expected to write equations for the 2 Describe how sodium hydroxide can be used to identify some cations to another student. Use sodium hydroxide to test for the following cations: aluminium calcium magnesium copper(ll) iron(ll) iron(lll). AT8
AQA-8462-SOW-ANALYSIS.DOCX