Chemistry C2 Additional Science 0.0 / 5 ? ChemistryAcids, bases and saltsGCSEAQA Created by: fitbird1234Created on: 22-04-16 08:48 Substances with a pH of less than 7 are? Acids 1 of 25 Substances with a pH higher than 7 are? Bases (when dissolved in water known as alkalis) 2 of 25 How are salts made? When an acid reacts with a base, carbonate or metal 3 of 25 What colour does acid turn the universal indicator? Red (strong) or orange or yellow (weak) 4 of 25 What do bases do when reacted with acids? Neutralise the acid and produce salt and water 5 of 25 What are bases usually? Metal oxides or hydroxides 6 of 25 What is an alkali? Bases that dissolve in water 7 of 25 What colour does an alkali turn the universal indicator? Dark blue/purple (strong), blue/green (weak) 8 of 25 What pH do neutral solutions have? 7 9 of 25 What colour do neutral solutions turn universal indicator? Green 10 of 25 What is an ion? Charged particle 11 of 25 How is an ion formed? When atoms lose or gain electrons 12 of 25 What does (l) mean? Liquid state 13 of 25 What does (aq) mean? Dissolved in water 14 of 25 What ions do acids make when dissolved in water? Aqueous Hydrogen (Remember: Acid= H+(aq)) 15 of 25 What ions do alkalis make when dissolved in water? Aqueous Hydroxide (Remember: Alkali = OH-(aq)) 16 of 25 How does a neutralisation reaction occur? When the H+(aq) ions form an acid which reacts with the alkali formed by the OH-(aq) ions. 17 of 25 What is the product of a neutralisation reaction? Water 18 of 25 What product is formed from this reaction ( acid + metal oxide) Salt + water 19 of 25 acid + metal hydroxide =? salt +water 20 of 25 acid + metal =? salt + hydrogen 21 of 25 How can hydrogen be detected? visually by bubbles, and detected by a lighted splint 22 of 25 What acid is used to produce a chloride salt? Hydrochloric acid 23 of 25 Nitrate salt? Nitric acid 24 of 25 Sulfate salt? Sulphuric acid 25 of 25
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