How do you tell which salt is more soluble using Ksp?
A saturated solution of magnesium hydroxide in water has a pH of 10.38. Calculate the Ksp for magnesium hydroxide. The relative MOLAR solubility of salts (saturated solution) can be determined by comparing Ksp values. The greater the Ksp the more ions are in solution, hence the greater the molar solubility.
How do you know which salt is more soluble?
If there two rules appear to contradict each other, the preceding rule takes precedence.
- Salts containing Group I elements (Li+, Na+, K+, Cs+, Rb+) are soluble . …
- Salts containing nitrate ion (NO3–) are generally soluble.
- Salts containing Cl –, Br –, or I – are generally soluble. …
- Most silver salts are insoluble.
How do you know which salt is least soluble?
1) Which salt is least soluble at 20oC? – To find the least soluble substance at a given temperature we follow the temperature line up and the first substance curve we hit is the least soluble. For most soluble it is the same proceedure except the last substance curve hit is the most soluble.
Does a higher Ksp precipitate first?
When two anions form slightly soluble compounds with the same cation, or when two cations form slightly soluble compounds with the same anion, the less soluble compound (usually, the compound with the smaller Ksp) generally precipitates first when we add a precipitating agent to a solution containing both anions (or …
Which of the following is least soluble in water Ksp?
CaF2 : Ksp = 3.9 x 10-11 (2) PbCl2: Ksp = 1.6 x 10-5 (3) AgCl : Ksp = 1.8 x 10-10 (4) Agloz: Ksp = 3.1 x 108.
What are the 4 factors affecting solubility?
Factors affecting solubility
- Temperature. Basically, solubility increases with temperature. …
- Polarity. In most cases solutes dissolve in solvents that have a similar polarity. …
- Pressure. Solid and liquid solutes. …
- Molecular size. …
- Stirring increases the speed of dissolving.
Is salt soluble or insoluble?
All sodium, potassium, and ammonium salts are soluble in water. 3. The chlorides, bromides, and iodides of all metals except lead, silver, and mercury(I) are soluble in water. HgI2 is insoluble in water.
What is the most soluble salt?
Water Solubility of Common Salts
|Ions||Solubility of salts|
|sodium (Na), potassium (K) and ammonium (NH4+)||all soluble|
|nitrates (NO3-)||all soluble|
|chlorides (Cl-) and iodides (I-)||most soluble|
|sulfates (SO42-)||most soluble|
What does a lower Ksp mean?
Ksp (Solubility product constant) is the equilibrium between a solid and its respective ions in a solution. The value of the constant identifies the degree of which the compound can dissociate in water. For example the higher the Ksp the more soluble the compound is.
How is Ksp calculated?
Let’s do an example: The solubility of Ag2CrO4 in water is 1.31 x 10-4 moles/L. Calculate the value of Ksp . Using mole ratios, the [Ag+] will go up by (2 x 1.31 x 10-4 moles/L) = 2.62 x 10-4 moles/L.