Vocabulary: acid, acidic, alkaline, base, indicator, neutral, pH Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. Acids are substances that produce hydrogen ions (H") when dissolved in water. Lemon juice is an
example of an acid.
A. What does lemon juice taste like?
B. What does it feel like if lemon juice gets in your eye?
2. Bases are substances that produce hydroxide ions (OH) when dissolved in water. Hand soap is an
example of a base.
A. What does soap feel like?
B. What does soap taste like?
C. What does it feel like if soap gets in your eye?
Gizmo Warm-up

No because it not possibly

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.

Answer the same molecular formula;