Flashcards
Acids and bases
Flashcards do conjunto (20)
- 1Metal oxides and metal hydroxides are what?Metal oxides and metal hydroxides are bases.
- 2A few bases are soluble in water, and are called what?A few bases are soluble in water, and are called alkalis.
- 3Give two examples of bases that are soluble in water.Sodium hydroxide and calcium hydroxide.
- 4When does neutralisation take place?Neutralisation takes place when an acid and a base react to make salt and water.
- 5What is the word equation for neutralisation?The word equation for neutralisation is:
acid + base → salt + water - 6Some indicators show a sudden colour change at one pH value. What does universal indicator show?Some indicators show a sudden colour change at one pH value. Universal indicator shows a gradual range of colour changes.
- 7Why does it do this?As it contains a mixture of different indicators.
- 8In solution, all acids contain which ions?In solution, all acids contain H+ ions (hydrogen ions).
- 9What is the pH of an acid determined by?The pH of an acid is determined by the concentration of H+ ions.
- 10The higher the concentration the lower or higher the pH?The higher the concentration the lower the pH.
- 11Fill the gaps: Neutralisation leaves .. .... H+ ions.Neutralisation leaves no free H+ ions.
- 12Alkalis contain which ions?Alkalis contain OH- ions (hydroxide ions).
- 13Neutralisation involves what reaction?Neutralisation involves this reaction:
H+ + OH- ↔ H2O - 14What do acids react with to form salts?Acids react with bases and metal carbonates to form salts.
- 15What are the word equations for making salt?The word equations or making salt are:
acid + base → salt + water
acid + metal carbonate →
salt + water + carbon dioxide - 16Salt names have two parts - what does the second part of the name show?Salt names have two parts - the second part of the name shows which acid it has been made from.
- 17Give the second part of the salt name for each of these common acids: Sulfuric Nitric Hydrochloric PhosphoricSulfuric - sulfate
Nitric - nitrate
Hydrochloric - chloride
Phosphoric - phosphate - 18Some common chemical equations for the neutralisation of acids by a base or metal carbonate can be constructed using what?Some common chemical equations for the neutralisation of acids by a base or metal carbonate can be constructed using:
- sulfuric acid, nitric acid, hydrochloric acid
- ammonia, potassium hydroxide, sodium hydroxide and copper oxide
- sodium carbonate and calcium carbonate. - 19What the word equation for the reaction between hydrochloric acid and copper carbonate?hydrochloric acid + copper carbonate → copper chloride + water + carbon dioxide
- 20Write the balanced symbol equation for the reaction between hydrochloric acid and copper carbonate.2HCl + CuCO3 → CuCl2 + H2O + CO2
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- GCSE Science Year 10 FlashCards sobre Acids and bases, criado por annjb2898 em 01-06-2014.
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