What inference can be drawn from the graph? ABCD
45
40
35
90
25
Concentration
20
Sis
10
5
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
The seconds)
ОА The reaction between A and is reactant favored.
On
The amount of product is greater than the amount of reactant
Oc The reaction uses all its reactants to form products.
D The reaction reaches equilibrium at 15 seconds.
ОЕ The amount of reactants is highest at equilibrium

Temperature and pressure

The correct answer is "hydrogen".

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.