One way to analyze a sports drink for the concentration of chloride ions is to add silver ions and weigh the resulting AgCl precipitate. One problem with the analysis is that many sports drinks contain phosphate ion ( PO 4 3 − ) , which will also precipitate with silver, thus interfering with the chloride measurement. The phosphate ion can be removed by precipitation prior to the analysis of chloride. (a) Use the solubility guidelines (Table 4.2) to choose a cation from the list below that would form a precipitate with phosphate but not with chloride. K + , Ba 2 + , Pb 2 + , NH 4 + (b) Write the net ionic reaction for the precipitation reaction from part (a).
One way to analyze a sports drink for the concentration of chloride ions is to add silver ions and weigh the resulting AgCl precipitate. One problem with the analysis is that many sports drinks contain phosphate ion ( PO 4 3 − ) , which will also precipitate with silver, thus interfering with the chloride measurement. The phosphate ion can be removed by precipitation prior to the analysis of chloride. (a) Use the solubility guidelines (Table 4.2) to choose a cation from the list below that would form a precipitate with phosphate but not with chloride. K + , Ba 2 + , Pb 2 + , NH 4 + (b) Write the net ionic reaction for the precipitation reaction from part (a).
Solution Summary: The author explains that the solubility of compounds plays an important role in determining the ion that precipitates with phosphate but not with chloride.
One way to analyze a sports drink for the concentration of chloride ions is to add silver ions and weigh the resulting AgCl precipitate. One problem with the analysis is that many sports drinks contain phosphate ion
(
PO
4
3
−
)
, which will also precipitate with silver, thus interfering with the chloride measurement. The phosphate ion can be removed by precipitation prior to the analysis of chloride. (a) Use the solubility guidelines (Table 4.2) to choose a cation from the list below that would form a precipitate with phosphate but not with chloride.
K
+
,
Ba
2
+
,
Pb
2
+
,
NH
4
+
(b) Write the net ionic reaction for the precipitation reaction from part (a).
く
Predicting the pr
Predict the major products of the following organic reaction:
Δ
Some important notes:
• Draw the major product, or products, of the reaction in the drawing area below.
• If there aren't any products, because no reaction will take place, check the box below the drawing area instead.
• Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are
enantiomers.
?
Click and drag to start drawing a structure.
propose synthesis
Explanation
O Conjugated Pi Systems
Deducing the reactants of a Diels-Alder reaction
Can the molecule on the right-hand side of this organic reaction be made in good yield from no more than two reactants, in one
step, by moderately heating the reactants?
?
Δ
If your answer is yes, then draw the reactant or reactants in the drawing area below. You can draw the reactants in any
arrangement you like.
• If your answer is no, check the box under the drawing area instead.
Click and drag to start drawing a structure.
X
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell