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Edexcel GCSE Combined Science (Chemistry) STANDARD > Topic 4 Acids and alkalis > Flashcards

Topic 4 Acids and alkalis Flashcards

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1
Q
  1. What term describes a substance that attacks metals, stonework and skin?
A

corrosive

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2
Q
  1. Name an acidic solution found in the kitchen.
A

vinegar or fruit juice, etc.

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3
Q
  1. Name an alkaline solution used in the kitchen.
A

bleach or oven cleaner or soap, etc.

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4
Q
  1. What type of substance turns litmus paper red?
A

acid

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5
Q
  1. How does an indicator show the acidity or alkalinity of solutions?
A

by changing colour

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6
Q
  1. What pH values represent alkaline solutions?
A

above 7 or 8 to 14

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7
Q
  1. What kind of reaction occurs between an acid and an alkali?
A

neutralisation

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8
Q
  1. What do you call a solution that is neither acidic nor alkaline.
A

neutral

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9
Q
  1. Which ion is in excess in all acidic solutions?
A

hydrogen ions or H+ ions

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10
Q
  1. Which ion is in excess in all alkaline solutions?
A

hydroxide ions or OH- ions

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11
Q
  1. What scale is used for measuring acidic and alkaline properties?
A

the pH scale

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12
Q
  1. Name three examples of acid/alkali indicators apart from universal indicator.
A

litmus, methyl orange and phenolphthalein

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13
Q
  1. What would you use to measure pH to one decimal place?
A

a pH meter

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14
Q
  1. What pH values are acidic?
A

below 7

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15
Q
  1. What word describes a solution that contains a large amount of solute in a small volume of solvent?
A

concentrated

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16
Q
  1. How can a solution be made more dilute?
A

by adding solvent/water

17
Q
  1. What kind of reaction occurs between an acid and a base?
A

neutralisation

18
Q
  1. What acid would be used to make zinc sulfate from zinc oxide?
A

sulfuric acid

19
Q
  1. How can a sample of a dissolved salt be obtained from a salt solution?
A

evaporation of the water

20
Q
  1. Which salt is formed when copper oxide reacts with sulfuric acid?
A

copper sulfate

21
Q
  1. Name the acid that has the formula HCl.
A

hydrochloric acid

22
Q
  1. What colour is phenolphthalein in alkaline solutions?
A

pink

23
Q
  1. What is the formula for sulfuric acid?
A

H2SO4

24
Q
  1. What is the formula for hydrochloric acid?
A

HCl

25
Q
  1. What colour is phenolphthalein in acidic solutions?
A

colourless not clear

26
Q
  1. Name a piece of apparatus used to measure volumes of liquid.
A

measuring cylinder/pipette/burette

27
Q
  1. Name the separation method used to produce crystals from a solution.
A

crystallisation

28
Q
  1. Name the acid needed to make ammonium nitrate.
A

nitric acid

29
Q
  1. Which acid can be used to make copper sulfate?
A

sulfuric acid

30
Q
  1. Which gas is formed when dilute hydrochloric acid reacts with magnesium?
A

hydrogen

31
Q
  1. Which gas is formed when dilute hydrochloric acid reacts with magnesium carbonate?
A

carbon dioxide

32
Q
  1. What acid can be used to make copper chloride?
A

hydrochloric acid

33
Q
  1. How do you identify hydrogen gas?
A

gives a squeaky pop with a lighted splint

34
Q
  1. What is seen when magnesium is added to dilute sulfuric acid?
A

effervescence/fizzing/bubbles

35
Q
  1. What gas is produced when copper carbonate is added to dilute nitric acid?
A

carbon dioxide

36
Q
  1. How do you test for carbon dioxide?
A

it turns limewater milky

Edexcel GCSE Combined Science (Chemistry) STANDARD (8 decks)

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