q7key - 1 Chem 171 Q7 Version A(5 pts each(Show work unit...

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Chem 171 Q7 Version A (5 pts each) (Show work, unit, sig fig for full credit) (Key TernMix/Tit) 1. When we add ammonia to a solution containing copper ion, a precipitate forms. Upon addition of more ammonia, the precipitate dissolves. Write the two net ionic equations corresponding to these observations. Show the phases. Cu 2+ (aq) + 2OH (aq) Cu (OH) 2 (s) Cu (OH) 2 (s) + 4NH 3 (aq) [Cu(NH 3 ) 4 ] 2+ (aq) 2. Define the following terms in one sentence: Primary Standard Titration A primary standard is any highly stable substance whose purity is extremely high from which we can determine the concentration of another solution. A titration is the use of a buret to quantitatively deliver a known amount of a solution of known concentration as it reacts with a known amount of solution of unknown concentration. Chem 171 Q7 Version B (5 pts each) (Show work, unit, sig fig for full credit) 1. Fill in the blanks with one of the following terms: water soluble, acid soluble, insoluble. Barium sulfate is insoluble.
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q7key - 1 Chem 171 Q7 Version A(5 pts each(Show work unit...

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