5.4.2.4 The pH Scale and Neutralisation Flashcards

1
Q

What do acids produce in aqueous solutions?

A
  • hydrogen ions
  • H+
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2
Q

What do aqueous solutions of alkalis contain?

A
  • hydroxide ions
  • OH-
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3
Q

What is the pH scale?

A
  • 0-14
  • measure of acidity or alkalinity of a solution
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4
Q

How can the acidity or alkalinity of a solution be measured?

A
  • universal indicator
  • pH probe
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5
Q

What is a solution with pH 7?

A
  • neutral
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6
Q

What pH do aqueous solutions of acids have?

A
  • less than 7
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7
Q

What pH do aqueous solutions of alkalis have?

A
  • greater than 7
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8
Q

What happens in a neutralisation reaction between an acid and an alkali?

A
  • hydrogen ions react with hydroxide ions to produce water
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9
Q

How can the neutralisation reaction between an acid and an alkali be represented?

A
  • H+ (aq) + OH-(aq) -> H2O(l)
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