calculations

Question 1

what is a solution

Answer 1

a homogenous mixture of two or more substances can be in the form of any matter

e.g. buffers, reaction mixtures, cell culture media

Question 2

what is concentration

Answer 2

how much of the solute is present per unit volume

molarity, mass/volume, normality, ppm/ppb

Question 3

what is percent weight volume

Answer 3

another variation of percentage weight volume is weight/volume. this variation measures the amount of solute in grams but measures the amount of solution in milliliters

Question 4

what is Molarity

Answer 4

A concentration unit

M=moles of solute/litres of solution

Question 5

What is Normaility

Answer 5

measure of concentration equal to the gram equivalent weight per litre of solution

Normality = n*Molarity
n=number of H+ in acid and OH- in salt

Question 6

What is gram equivalent weight

Answer 6

measure of the reactive capacity of a molecule

equivalent weight= molecular mass/number of H+ ions
Gram equivalent= mass of solute/ equivalent weight

Question 7

How to calculate the normaility of a solution

Answer 7

1. find the equivalent weight of the solute based on chem reaction
2. calculate no. of gram equivalent of solute
3. calculate volume in litre
4. calculate normaility