the BIG KS3 Science-Chemistry crossword quiz on 7E "Acids and Alkalis"   (QCA 7E) KS3 chemistry index * Crossword puzzle ANSWERS

Across: 2 Acids on your skin! (8) 5 The pH ????? (5) 7 It musn't be too acid for plants! (4) 8 If the pH is over 7. (8) 10 Colour of litmus in acid. (3) 12 You can extract these coloured materials from plants. (7,4) 14 Some treated with weak acid, some with weak alkali, depends on the insect! (5) 17 In the list, only just acid. (4) 18 The pH of strong acids. (3) 21 This juice is acid, but very nice on Whitby fish! (5) 22 Spilt concentrated acid is one! (6) 23 this juice is acid. (5) 24 Used to neutralise stomach acid! (7) 26 The pH of a strong alkali. (4) 31 Common name for a well known weak acid used in food preparation. (7) 32 1st name of a well known acid (12) 33 The best type of acid if it spills on you! (4) 34 "My dear Watson, this perfectly describes the effect of 'prussic acid' on the victim"! (5) 35 It turns litmus blue. (6) 36 a well known strong alkali (6,9) Down: 1 1st name of a well known acid, internationally the PH is usually F! (9) 2 To test for how acid or alkaline a solution is. (9)     4 The pH number of a strong acid. (3) 5 This kind of acid is the most corrosive! (6) 6 Put on soil that is too acid for healthy plant growth. (4) 8 If the universal indicator turns red it means? (6) 9 If the universal indicator turns green it means? (7) 11 A well known indicator. (9) 13 This doesn't like too much acid, but just enough for digestion! (7) 15 The colour of universal indicator in a very strong alkali. (6) 16 The pH of a neutral solution. (5) 19 is its symbol. (9) 20 The hazard warning sign for this is a cross. (7) 25 It neutralises an alkali. (4) 27 It means very corrosive and 'soda' is an example! (7) 28 The name of the acidity and alkalinity scale. (2) 29 This chloride is 'common salt'. (6) 30 The pH of a very weakly acid solution. (3)

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