Chemistry- C4 Part B 0.0 / 5 ? ChemistryChemical ChangesGCSEAQA Created by: 13clarkenCreated on: 26-03-18 14:43 89254361107 Across 1. ... reaction- A more reactive metal will displace a less reactive metal. The metal ion always is reduced (gains electrons) and the metal atom is always oxidised (loses electrons) (12) 5. Positive ions move towards the ... (-ive) and gain electrons (7) 6. Negative ions move towards the ... (+ive) and lose electrons (5) 7. Ionic solids can't be electrolysed as the ions are in ... positions (5) Down 2. At the ... if hydrogen ions and and metal ions are present, hydrogen gas will be produced if the metal is more reactive than hydrogen. If it's less reactive, a solid layer of pure metal will be produced (7) 3. ... equations show the reactions at the electrodes (4) 4. Metals need to be seperated from oxides by the process of oxidation. This reaction is called a ... reaction (9) 8. At the ... if hydroxide ions and halide ions are present, molecules of chlorine, bromine or iodine will be formed. If there are no halide ions then oxygen will be produced (5) 9. Hydrogen ions and hydroxide ions are produced from the water in ... solutions (7) 10. A ... reaction is when there is a loss and a gain of electrons in one reaction. Loss of electrons = Oxidation. Gain of electrons = Reduction (5)
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