# What is it called when the rate of crystallization equals the rate of dissolving?

## What is it called when the rate of crystallization equals the rate of dissolving?

When a solution is saturated and excess solute is present, the rate of dissolution is exactly equal to the rate of crystallization (Figure 13.2. 1b). Using the value just stated, a saturated aqueous solution of NaCl, for example, contains 35.9 g of NaCl per 100 mL of water at 20°C.

## What solution in which the rates of dissolving and crystallizing are equal?

saturated
If the rates of solubility and crystallization are the same, the solution is saturated, and dynamic equilibrium is reached.

When the rate of solvation equals the rate of crystallization the solution is?

state of dynamic equilibrium
When the rate of solvation equals the rate of crystallization, a state of dynamic equilibrium exists. 5.

When the amount of solute in the solution is equal to the solubility of the solute The solution is called?

When a solute’s concentration is equal to its solubility, the solution is said to be saturated with that solute. If the solute’s concentration is less than its solubility, the solution is said to be unsaturated.

### What happens to the rate of dissolution and the rate of crystallization in solution equilibrium?

A system in which crystallization and dissolution occur at the same rate is in dynamic equilibrium. The solubility of most substances depends strongly on the temperature. The solubility of most solid or liquid solutes increases with increasing temperature.

### Why do supersaturated solutions crystallize?

When a solution that has had more solute dissolved at a higher temperature is now cooled, it becomes supersaturated at the lower temperature. Because that supersaturated solution holds more solute than is stable at the lower temperature, crystals start to form.

How does the saturation of a solution affect crystal formation?

A solute is dissolved in the solvent until the saturation point is reached. After saturation point is reached, solute starts to form a precipitate. Precipitation affects the crystal formation or pure crystals are not formed.

When a solution is saturated and additional solid solute is added what happens?

If more solute is added and it does not dissolve, then the original solution was saturated. If the added solute dissolves, then the original solution was unsaturated. A solution that has been allowed to reach equilibrium but which has extra undissolved solute at the bottom of the container must be saturated.

## What does Henry’s law say?

Henry’s law is one of the gas laws states that: at a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.

## Is a solution that has an equal amount of solutes?

The solution which has equal amount of solute and solvent is called saturated solution.

What is the relationship between solubility and crystallization?

Crystallization is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound.

What is meant by the rate of dissolution of a solute?

The rate of dissolution, in contrast, is a measure of how fast a solute dissolves in a solvent. There are three factors that affect the rate of dissolution: (1) the surface area of the solute, (2) the temperature of the solvent, and (3) the amount of agitation that occurs when the solute and the solvent are mixed.