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Combined and Co-ordinated Sciences (Chemistry 2)

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  • Do all metal oxides dissolve in water? What pH solutions do they form?
    no; usually alkaline
  • a molecule or ion that is able to accept a proton
    a base
  • Explain the normal method of preparing carbon dioxide in the lab.
    Dilute hydrochloric acid is reacted with marble chips (calcium carbonate).
  • What salt is made with sodium hydroxide and sulfuric acid (H2SO4)?
    sodium sulfate (Na2SO4)
  • Which word means "capable of reacting as either an acid or a base"?
    amphoteric (or amphiprotic)
  • Why is water neutral?
    Concentrations of H+ and OH- are equal.
  • Alkali solutions have an excess of ______ ions.
    OH-
  • When an acid reacts with a reactive metal, a metal carbonate, or a base, it will produce...
    a salt
  • What does amphoteric mean?
    capable of reacting as either an acid or a base
  • Which of the four is the weakest alkali? (caustic soda, caustic potash, ammonia, limewater)
    ammonia
  • Arrange the metals from most reactive to least reactive: lead, calcium, copper
    calcium, lead, copper
  • What is another way to describe a hydrogen ion (H+)?
    a proton
  • What is the chemical name for marble?
    calcium carbonate (CaCO3)
  • What kind of reaction is H+(aq) + OH-(aq) --> H2O(l)
    neutralization
  • Which metals produce hydrogen in unsafe reactions with acids?
    very reactive metals like sodium or calcium
  • What are the products of magnesium reacting with nitric acid (2)HNO3(aq)?
    Mg(NO3)2(aq) + H2(g)
  • What is created when a metal takes the place of the hydrogen in an acid?
    a salt
  • How can we test a gas to see if it is CO2?
    Pass it through limewater. If it turns cloudy, it is carbon dioxide.
  • a molecule or ion that is able to donate a proton
    an acid
  • Insoluble salts like barium sulfate and silver chloride are not crystallized, but instead produced by ionic p____________.
    precipitation
  • What salt is made with potassium hydroxide (KOH) and nitric acid (HNO3)?
    potassium nitrate (KNO3)
  • How can we test for carbonates?
    If it reacts with an acid to produce a gas (CO2) it indicates carbonates.
  • Summarize the reaction of acids with carbonates.
    acid + metal carbonate -> salt + water + carbon dioxide
  • Salts are produced when the hydrogen in the acid is replaced by a ______?
    metal
  • What salt is made with copper oxide and hydrochloric acid?
    copper chloride (CuCl2)
  • What are the products of a metal reacting with an acid?
    salt + hydrogen
  • What are the products of the reaction between sodium hydroxide and hydrochloric acid?
    sodium chloride and water
  • Name the three reactions in which all acids take part. An acid can react with...
    (1) a reactive metal (2) a base (3) a metal carbonate or metal hydrogencarbonate
  • Summarize the reaction of an acid with a base.
    acid + base -> salt + water
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