Regents Chemistry Solutions

Explanation
Water is a good solvent, several things can dissolve IN water.

Explanation
A solution that has the maximum amount of solid dissolved at a certain temperature is said to be saturated. This means that the solution has reached its maximum capacity to dissolve the solid and any additional solid added will not dissolve. The concentration of the dissolved solid is at its highest possible level in a saturated solution.

Explanation
A solution that has some solid dissolved but could have more added to it is said to be unsaturated. This means that the solution has not reached its maximum capacity for dissolving solute, and more solute can be added without causing precipitation or saturation.

Explanation
A solution made by dissolving the maximum amount of solid at a higher temperature and then cooling the mixture to a lower temperature is said to be supersaturated. This is because the solute is dissolved in excess at the higher temperature, and as the solution cools down, it becomes unable to hold all the solute particles. As a result, the excess solute precipitates out, creating a solution that is supersaturated with the solute.

Explanation
According to table G, at 60oC, the maximum amount of KNO3 that can be dissolved in 100 g H2O is 85 g.

Explanation
As temperature increases, the kinetic energy of the solvent molecules also increases. This increased kinetic energy allows the solvent molecules to move more quickly and collide with the solute particles more frequently and with greater force. This leads to the breaking of intermolecular forces between solute particles and the dissolution of the solute in the solvent. Therefore, the solubility of most solids tends to increase with increasing temperature.

Explanation
As temperature increases, the solubility of most gases decreases. This is because an increase in temperature causes the gas particles to gain more kinetic energy, leading to increased movement and decreased attraction to the solvent molecules. As a result, the gas molecules are more likely to escape from the solvent, reducing the solubility.

Explanation
If you double the amount of water, you double the amount of solute that can be dissolved.

Explanation
According to table F, Mg3PO4 is insoluble.

Explanation
In a molarity calculation, moles of solute are divided by liters of solution. This is because molarity is defined as the number of moles of solute per liter of solution. By dividing the moles of solute by the volume of the solution in liters, we can determine the concentration of the solute in the solution.

Explanation
PPM stands for parts per million, which is a unit used to express the concentration of a substance in a solution. It represents the number of parts of a particular substance present in one million parts of the solution. This unit is commonly used in various fields such as environmental science, chemistry, and industry to measure the concentration of pollutants, chemicals, or impurities in a given sample.

Explanation
When a solute is added to a solvent to form a solution, it disrupts the regular arrangement of solvent molecules, making it more difficult for the solvent to transition from a liquid to a gas phase. This leads to an increase in the boiling point of the solution compared to the boiling point of the pure solvent. On the other hand, the presence of the solute also interferes with the formation of solvent crystals during freezing, resulting in a lower freezing point for the solution compared to the freezing point of the pure solvent.