The cards Question What pH does an acid have? Tap to flip Answer Less than 7. Question What is a base? Tap to flip Answer A substance that reacts with an acid to form a compound called a salt. Question What is an alkali? Tap to flip Answer A soluble base; it forms alkaline solutions with a pH greater than 7. Question What taste do edible acids have? Tap to flip Answer A sour taste. Question What colour does an acid turn blue litmus paper? Tap to flip Answer Red. Question What colour does an alkali turn red litmus paper? Tap to flip Answer Blue. Question What does the pH scale measure? Tap to flip Answer How acidic or alkaline a solution is. Question What is the pH of a neutral solution? Tap to flip Answer 7. Question What word describes a solution with a pH of more than 7? Tap to flip Answer Alkaline. Question What does pH stand for? Tap to flip Answer Potential of hydrogen. Question As the concentration of hydrogen in a solution rises, what happens to its pH? Tap to flip Answer The pH gets lower. Question How many times more acidic is a solution of pH 2 than one of pH 3? Tap to flip Answer Ten times, because the pH scale goes up and down in factors of ten. Question Why are indicators needed to identify most acids and alkalis? Tap to flip Answer Because most acids and alkalis are colourless solutions. Question In chemistry, what is concentration? Tap to flip Answer The amount of chemical dissolved in a certain volume of solution. Question What colour is red cabbage indicator in an acid? Tap to flip Answer Pink or red. Question What colour is red cabbage indicator in a neutral solution? Tap to flip Answer Purple. Question What colour is red cabbage indicator in an alkali? Tap to flip Answer Green. Question What is a chemical indicator? Tap to flip Answer A chemical that changes colour to show that a substance is present, for example whether a solution is an acid or an alkali. Question How does universal indicator respond to different pH values? Tap to flip Answer It turns many different colours depending on the pH. Question What is effervescence? Tap to flip Answer Bubbles of gas being produced in a liquid; another way of saying the liquid is fizzing. Question What are the products when a metal reacts with an acid? Tap to flip Answer A metal salt and hydrogen gas. Question What is the test for hydrogen gas? Tap to flip Answer Put a lit splint into the gas: hydrogen makes a squeaky pop. Question Is the reaction of a metal with an acid exothermic or endothermic? Tap to flip Answer Exothermic. Question What is a metal oxide? Tap to flip Answer A substance made of metal atoms bonded to oxygen atoms. Question Are metal oxides acids or bases? Tap to flip Answer Bases: they can react with acids to neutralise them. Question What are the products when a metal oxide reacts with an acid? Tap to flip Answer A metal salt and water. Question What kind of solution do non-metal oxides make in water? Tap to flip Answer Acidic solutions. Question What is neutralisation? Tap to flip Answer A reaction between an acid and a base that produces a neutral solution of a metal salt and water. Question What is the formula of sodium hydroxide solution? Tap to flip Answer NaOH(aq). Question What is the formula of hydrochloric acid? Tap to flip Answer HCl(aq). Question What does the state symbol (aq) mean in a chemical equation? Tap to flip Answer The substance is in solution (dissolved in water). Question How is the metal salt from a neutralisation reaction named? Tap to flip Answer After the metal (from the base) and the acid used. Question In a neutralisation reaction, which product is the neutral substance? Tap to flip Answer Water, which contains hydrogen and oxygen atoms from the acid and the base. Question What is a carbonate group? Tap to flip Answer One carbon atom and three oxygen atoms bonded together. Question What are the products when a metal carbonate reacts with an acid? Tap to flip Answer A salt, water and carbon dioxide. Question What is the test for carbon dioxide? Tap to flip Answer Bubble the gas through limewater: it turns cloudy (milky). Question Is ordinary rainwater usually neutral, a little acidic or a little alkaline? Tap to flip Answer A little acidic. Question What is acid rain? Tap to flip Answer Rainwater that is more acidic than usual because of air pollution, usually from sulfur dioxide and nitrogen oxides. Question What is chemical weathering? Tap to flip Answer Rocks being broken down by a chemical change, for example by reactions with acid rain. Question What are the products when acid rain reacts with marble? Tap to flip Answer A salt, water and carbon dioxide. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage Key stage 3 (Years 7–9) Course KS3 Science Unit Acids and bases England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Science lesson by Oak National Academy licensed under Open Government Licence (OGL)
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