10. Define the following terms:
a) Molarity
b) Molality
c) Concentration and PPM
Answers
Answer:
(i) Mole fraction
It is the ratio of the number of moles of a particular component to the total number of moles of all the components in the mixture. It is denoted by symbol χ.
(ii) Molality
It is the number of moles of the solute per kilogram of the solvent. It is the ratio of the number of moles of solute to the mass of solvent in kg.
(iii) Molarity
It is the number of moles of solute per litre of the solution. It is the ratio of the number of moles of solute to the volume of solution in litre.
(iv) Mass percentage
The mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. The mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%.
.
.
.
.
.
Stay safe
Answer:
Molality- molality also called molal concentration, is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent. This contrasts with the definition of molarity which is based on a specified volume of solutions.
Molarity- is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.
PPM-Parts per million (ppm) is the number of units of mass of a contaminant per million units of total mass. Source: GreenFacts. More: ppm (or ppmm) is used to measure the concentration of a contaminant in soils and sediments. In that case 1 ppm equals 1 mg of substance per kg of solid (mg/kg).
hope this help you......