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28 Cards in this Set
- Front
- Back
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How can you measure pH more accurately than with only universal indicator paper? |
Using a pH meter. |
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How can you adjust a pH meter to make sure it's reading accurately? |
Put it into a solution with a known pH then adjust the reading so it gives exactly that value. |
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What colour is litmus paper in acidic, neutral and alkaline solutions? |
Red in acidic, purple in neutral and blue in alkaline solutions. |
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What colour is methyl orange in acidic and alkaline solutions? |
Yellow in alkaline and red in acidic solutions. |
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What colour is phenolphthalein in acidic and alkaline solutions? |
Bright pink in alkaline solutions, colourless in acidic solutions. |
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How are salts formed? |
A salt is formed when hydrogen present in an acid is replaced by a metal. |
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What is the product of an acid and a metal? |
Salt + Hydrogen. |
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What is the product of an acid + metal oxide? |
Salt + Water |
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What is the product of an acid + metal carbonate? |
Salt + Water + CO2 |
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What type of reaction forms an insoluble salt? |
Precipitation |
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Are compounds containing sodium, potassium and ammonium soluble or insoluble? |
Soluble. |
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Are nitrates soluble or insoluble? |
Soluble. |
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Is silver chloride, bromide and iodide soluble or insoluble? |
Insoluble. |
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Are most halides (chlorides, bromides and iodides) soluble or insoluble? |
Soluble. |
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Are most carbonates (other than the three exceptions, name them) soluble or insoluble? |
Insoluble (other than sodium, potassium and ammonium carbonates). |
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Are most hydroxides (other than the three exceptions, name them) soluble or insoluble? |
Insoluble (other than sodium, potassium and ammonium hydroxides) |
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Are barium and calcium sulphates soluble or insoluble? |
Insoluble |
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Are most sulphates (other than the two exceptions, name them) soluble or insoluble? |
Soluble (other than barium and calcium sulphates) |
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Copper (II) oxide + Sulphuric acid = ? |
Copper (II) sulphate + water. |
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Describe the filtration method. |
Reacting an acid with an excess of a solid metal, metal oxide, hydroxide or carbonate. Then filter and then evaporate the solution to crystallisation point. |
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Describe the titration method. |
add an amount of sodium, potassium or ammonium salt solution to a conical flask with some phenolphthalein, it should be pink. Fill the burette with dilute acid and make a note of the measurement, then add it to the alkali drop by drop until it just turns colourless. Make a note of the end measurement and work out how much acid has been added. |
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What should you do to ensure the reliability of a titration experiment? |
Do a rough titration before, then repeat the titration multiple times and find the mean of two results that are within 0.20 of each other. |
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What is the chemical symbol for hydrochloric acid? |
HCl |
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What is the chemical symbol for sulphuric acid? |
H2so4 |
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What is the chemical symbol for nitric acid? |
HNO3 |
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What is the chemical symbol for a carbonate? eg. copper carbonate |
CuCO3 |
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What is the chemical symbol for a hydroxide? eg. sodium hydroxide |
NaOH |
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What is the chemical symbol for an oxide? eg. copper oxide |
CuO |
