Group 2 Revision 0.0 / 5 ? ChemistryGroup 2A2/A-levelOCR Created by: ElishaGCreated on: 05-02-17 15:11 What is oxidation? The loss of electrons/increase in oxidation number. 1 of 22 What is redox? A reaction where both oxidation and reduction occur. 2 of 22 How do group 2 elements react? By losing electrons. 3 of 22 What colour flame does Mg,Ca,Sr and Ba have? Mg-white light. Ca-brick-red. Sr-crimson. Ba- green. 4 of 22 What is the product when a metal and oxygen react? A metal oxide forms. 5 of 22 What is the product when metal and water react? Metal hydroxide and hydrogen. 6 of 22 What are the products when Mg react with water? Slowly reacts to from Magnesium hydroxide and hydrogen. 7 of 22 What are the products when Mg reacts with steam? MgO and hydrogen. 8 of 22 What is the product when metal and acid react? Salt and hydrogen. 9 of 22 What is the product when metal and chlorine react? Metal chloride. 10 of 22 What is the trend in reactivity down the group? Reactivity increases down the group. 11 of 22 Why does reactivity increase down the group? 1)Increasing atomic radius. 2)Increasing electron shielding. 3)Decreasing nuclear attraction to outermost electrons. 4) Decreasing ionisation energy. 12 of 22 What is the product when a metal oxide and water react? Metal hydroxide. 13 of 22 What does a metal carbonate decompose to? Metal oxide and carbon dioxide. 14 of 22 What is the trend in stability down the group? Stability increases down the group. 15 of 22 What is the trend in solubility for group 2 sulfates up the group? More soluble as you go up the group. 16 of 22 What is a use of barium sulfate? Used to diagnose disorders in stomach and small intestines. It's given in a barium meal and creates a dark shadow on X-rays 17 of 22 What is the trend in solubility for group 2 hydroxides down the group? More soluble as you go down the group. 18 of 22 What is a use for calcium hydroxide? Reduce the acidity of soils as it neutralises the acid to form salt and water. 19 of 22 What is a disadvantage of using calcium hydroxide? Too much can make soils too alkaline. 20 of 22 What is a use of magnesium hydroxide? Antacid in indigestion remedies as it neutralises stomach acid. 21 of 22 What is a disadvantage of magnesium hydroxide? Stomach acid is necessary for good digestion. 22 of 22
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