Edited Invalid date
18.3 Buffer Effectiveness: Buffer Range and
In Table 5.1, we were able to classify ionic compounds as either insoluble orsoluble.
Applying equilibrium to the dissolution of an ionic compound can help us understand its solubility.
Solids are not included in the equilibrium expression due to the fact that the concentration of a solid is constant and does not change when more solid is added.
The complete list can be found in Appendix IIC.
At a given temperature, the solubility product constant has one value.
Different values can be found in different solutions.
Even though the product constant is the same for both solutions, the solubility of AgCl in pure water is different from that in an NaCl solution due to the common ion effect.
The amount of Ag + or Cl- present in solution when equilibrium is reached is related to the amount of Ag in the solution.
The molar solubility of PbCl2 can be calculated.
Concentrations of CaCO3 and MgCO3 can be found in soils rich in these compounds in many parts of the United States.
Calcium and magnesium are part of a healthy diet and hard water is not a health hazard.
Their presence in the water can be a nuisance.
Hard water becomes saturated with CaCO3 and MgCO3 when it evaporates.
Some dissolved ion can be used as salts.
There are deposits on faucets, sinks, and cookware.
There are spots of CaCO3 and MgCO3 left by washing cars or dishes.
Water can be softened.
The Ca2 + and Mg2+ ion present in hard water are replaced by K + or Na +.
The way that Ca2+ and Mg2+ ion form deposits is different due to the fact that the salts are notsoluble.
When sodium is used to ionize the water in the reservoirs is rich in limestone.
CaCO3 and MgCO3 are dissolved in the hard water.
When hard water is lost, it can leave deposits of salts on the shores that are high in sodium, as well as on the plumbing of lakes and reservoirs, which can be a disadvantage.
The common ion effect was first encountered in Section 18.2.
The Common ion dissociation of CaF2 is represented in a 0.
100 M NaF solution.
Our approximation is valid.
CaF2 is over 20,000 times moresoluble in water than it is in the NaF solution.
The solubility of a compound can be affected by the solution's pH.
The concentration of OH- in the solution is high if the pH is high.
The solubility of Mg(OH)2 in an acidic solution is higher than it is in a basic solution.
Increasing acidity increases the solubility of an ionic compound with a weakly basic anion.
OH-, S2, and CO 2 3 are common basic anions.
hydroxides, sulfides, and carbonates can be found in acidic water.
Due to the acidic nature of the water, it can cause rocks high in limestone to be dissolved as it flows through the ground.
stalagmites grow in ground caverns such as those at Carlsbad Caverns National Park in New Mexico.
The dramatic mineral formations in underground caves are created by the calcium ping water in the cave and the CaCO carbonate in the water 3 within the cave.
Determine if each compound is more compatible in an acidic solution than it is in a neutral solution.
BaF2 can be found in acidic and neutral solutions because the F- ion is weak.
The OH- ion of Ca(OH)2 makes it stronger in an acidic solution than it is in a neutral solution.
View flashcards and assignments made for the note
Getting your flashcards
Privacy & Terms