AQA A LEVEL CHEMISTRY PAPER 1,7405/1|PAPER 2,7405/2|PAPER 3,7405/3 VERSION 1.0 FINAL QUESTION PAPERS & MERGED MARKING SCHEME | JUNE 2023|MARKING SCHEME 100% CORRECT
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This question is about complexes of the transition metal chromium. 0 1 . 1 State the meaning of the term transition metal complex. [1 mark] Cr(PF3)6 is a complex of chromium that contains molecules of PF3 0 1 . 2 The electron pair repulsion theory can be used to predict the shape of a PF3 molecu...
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Add to cartThis question is about complexes of the transition metal chromium. 0 1 . 1 State the meaning of the term transition metal complex. [1 mark] Cr(PF3)6 is a complex of chromium that contains molecules of PF3 0 1 . 2 The electron pair repulsion theory can be used to predict the shape of a PF3 molecu...
This question is about rates of reaction. Figure 1 shows apparatus used to measure the rate of reaction when an acid reacts with an excess of solid sodium hydrogencarbonate, NaHCO3 When different monoprotic organic acids are used, the rates at which gas escapes can be used to compare the strengt...
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Add to cartThis question is about rates of reaction. Figure 1 shows apparatus used to measure the rate of reaction when an acid reacts with an excess of solid sodium hydrogencarbonate, NaHCO3 When different monoprotic organic acids are used, the rates at which gas escapes can be used to compare the strengt...
Ethyl ethanoate can be made by reacting ethanol with ethanoic acid in the presence of concentrated sulfuric acid. Method 1. A mixture of ethanol, ethanoic acid, and concentrated sulfuric acid, with anti-bumping granules, is heated under reflux for 10 minutes. 2. The apparatus is rearranged for ...
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Add to cartEthyl ethanoate can be made by reacting ethanol with ethanoic acid in the presence of concentrated sulfuric acid. Method 1. A mixture of ethanol, ethanoic acid, and concentrated sulfuric acid, with anti-bumping granules, is heated under reflux for 10 minutes. 2. The apparatus is rearranged for ...
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