Write A if only statement A is true; Write B if only statement B is true; Write C if both statements A and B are true; Write D if both statements A and B are false. ______ (1) A. Boiling chips are referred to as pieces of broken glassware. B. In the experiment of copper reactions, boiling chips are added to prevent the bumping of molecules. ______ (2) A. In decantation, the solvent is being poured off leaving behind precipitates. B. The equation for % yield is final mass-initial mass divided by 100. ______ (3) A. In copper reactions, some of the zinc metal which is present in excess, reduces hydronium ion to oxygen. B. Zinc is referred to as a more active metal than copper because it is more easily reduced. ______ (4) A. Methanol and ether are used for drying the recovered copper. B. Step 2 in copper reactions is referring to the formation of copper (11) hydroxide. ______ (5) A. The last step in copper reactions experiment refers to the recovery of the dried copper. B. The maximum % yield of the dried recovered product is 100%.
Write A if only statement A is true;
Write B if only statement B is true;
Write C if both statements A and B are true;
Write D if both statements A and B are false.
______ (1) A. Boiling chips are referred to as pieces of broken glassware.
B. In the experiment of copper reactions, boiling chips are added to prevent the bumping of molecules.
______ (2) A. In decantation, the solvent is being poured off leaving behind precipitates.
B. The equation for % yield is final mass-initial mass divided by 100.
______ (3) A. In copper reactions, some of the zinc metal which is present in excess, reduces hydronium ion to oxygen.
B. Zinc is referred to as a more active metal than copper because it is more easily reduced.
______ (4) A. Methanol and ether are used for drying the recovered copper.
B. Step 2 in copper reactions is referring to the formation of copper (11) hydroxide.
______ (5) A. The last step in copper reactions experiment refers to the recovery of the dried copper.
B. The maximum % yield of the dried recovered product is 100%.
______ (6) A. The calculation of the % yield of the recovered product is based on the Law of Conservation of Energy.
B. Hydroxide ion can displace water from the copper (II) ion, yielding copper nitrate, Cu (NO3)2, a blue precipitate.
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