Solubility and Solutions Concepts

Front

What is the definition of ppm (parts per million)?

Back

PPM is a unit of measurement that describes the concentration of one substance in a million parts of another, often used to measure the concentration of solutes in solutions.

Front

What is an electrolyte?

Back

An electrolyte is a substance that dissolves in water and conducts electric current.

Front

What is the difference between polar and non-polar molecules?

Back

Polar molecules have a distribution of electrical charge that leads to positive and negative poles, while non-polar molecules have an even distribution of charge.

Front

How do you calculate the number of moles in a solution?

Back

Moles = Molarity (M) x Volume (L). For example, in a 1.5 M NaCl solution with 6000 mL, Moles = 1.5 x 6 = 9 moles.

Front

What makes a molecule nonpolar?

Back

A molecule is nonpolar if there are no nonbonding pairs on the central atom and all atoms bonded to the central atom are the same.

Front

What is the solubility of a substance?

Back

Solubility is the maximum amount of a solute that can dissolve in a given amount of solvent at a specific temperature and pressure.

Front

What is a saturated solution?

Back

A saturated solution is one in which the maximum amount of solute has been dissolved in the solvent at a given temperature.

Front

What is the role of temperature in solubility?

Back

Generally, increasing temperature increases the solubility of solids in liquids, while the solubility of gases decreases with increasing temperature.

Front

What is a colloid?

Back

A colloid is a mixture where tiny particles of one substance are dispersed evenly throughout another substance.

Front

What is the difference between a solution and a suspension?

Back

A solution is a homogeneous mixture where the solute is completely dissolved, while a suspension contains larger particles that can settle over time.