OCR A2 Chemistry: Acid-Base Reactions 0.0 / 5 ? ChemistryAcids, bases and saltsA2/A-levelOCR Created by: LucySPGCreated on: 15-09-13 18:04 Name the 4 properties of acidic solutions Turns litmus read. pH < 7. Neutralises bases. 1 of 18 What is an acid? A substance that has the ability to transfer H+ ions 2 of 18 What is a base? A substance that accepts H+ ions 3 of 18 What is an alkali? A base that dissolves in water to produce hydroxide ions 4 of 18 What is the theory of H+ transfer known as? The Brönsted-Lowry theory 5 of 18 What is the Brönsted-Lowry theory? An acid is a H+ donor. A base is a H+ acceptor. 6 of 18 What is a conjugate acid? The species that accepts protons in the reverse reaction 7 of 18 What is a conjugate base? The species that donates protons in the reverse reaction 8 of 18 What are substances that can act as both acids and bases called? Amphoteric 9 of 18 What happens during an acid-base reaction? H+ ions move from the acid to the base 10 of 18 What is a conjugate base and a conjugate acid reffered to as? A conjugate acid-base pair 11 of 18 What are acids that are powerful proton donors called? Strong acids 12 of 18 What are acids that are moderate or poor proton donors called? Weak acids 13 of 18 What strength is the base of a strong acid? Weak base 14 of 18 What strength is the acid of a strong base? Weak acid 15 of 18 Are acid-base indicators weak or strong acids? Weak acids 16 of 18 What must the conjugate acid and base have in order to behave as indicators? Different colours 17 of 18 What determines the colour of the indicator? The posistion of equilibrium 18 of 18
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