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2 Written questions

2 Multiple choice questions

  1. - substances that resist changes in pH
    - optimum blood pH of 7.4 (slightly basic) +/-0.05
    - eg. carbonic - bicarbonate base pair in blood
    -eg. If a person's blood gets acidic (has extra H+ ions), HCO3(bicarbonate) ions react with the surplus H+ ions
  2. - proton acceptor/produces OH` (hydroxide) ions
    Eg. NaOH -> Na+ + OH`
    - BITTER and feels slippery
    - conducts electricity
    - turns RED litmus paper BLUE

1 True/False question

  1. Acids- proton donor/produces H+/H3O+ ions
    Eg. 2HCl(aq) + Mg(s) -> MgCl2(aq) + H2(g)
    - SOUR
    - conducts electricity
    - reacts with metals to produce hydrogen gas
    - turns BLUE litmus paper RED


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