C3 - Unit 3 0.0 / 5 ? ChemistryThe Periodic TableWater hardness and solubilityAnalysing substancesOrganic and Green ChemistryGCSEAQA Created by: emilygibson97Created on: 05-04-14 22:01 What are the elements in group 1? Alkali metals. 1 of 16 What are the elements between group 2 and 3? Transition metals. 2 of 16 What are the elements in group 7? Halogens. 3 of 16 What does hard water contain? Dissolved compounds such as calcium and magnesium salts. 4 of 16 What is hard water better? Good for developing and maintaining teeth and bones, also helps prevent heart disease. 5 of 16 Disadvantages of hard water? Creates scum and scale. 6 of 16 Advantages of hard water? Fluoride in the water helps prevent tooth decay, 7 of 16 What reaction takes place when food and fuels react with oxygen? Exothermic. 8 of 16 How can you test for positive ions? The flame test or using hydroxide solution. 9 of 16 How can you test for negative ions? Adding dilute hydrochloric acid to see if it fizzes and turns cloudy or by precipitation. 10 of 16 What does titration do? Sees how much acid and alkali reacted together completely. 11 of 16 What is chemical equilibrium? When the rates of the forward and reverse reactions are equal. 12 of 16 What is the Haber process? Used to manufacture a reasonable yield of ammonia in the quickest time possible. With 200 atmospheres at 450'c. 13 of 16 What is the structure of an alcohol? -OH 14 of 16 What is the structure of a carboxylic acid? -COOH 15 of 16 What is the structure of esters? -COO- 16 of 16
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