Table 4.1 KI
KOH
Na,,
Na, so
Ca(NO3),
NR
Faint white
prec.*
White prec.
NR
Cu(NO )2
Brown prec.
Blue prec.
Blue prec.
NR
Ni (NOR),
NR
Light blue-green Very faint blue
prec.
prec.
NR
Zn (NO)
NR
NR
Milky white
prec.
Faint white
prec.
"Note: These reactions are very slow, so it is possible you did not see a change in the time given.
1. Write a balanced chemical equation for each double replacement reaction that occurs.
Note: Compounds with Na, K, and/or NO-are soluble.

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.