Concentration of SolutionsBy: JINKY N. ORAIZ

Let’s Recall: TRUE or FALSE

A solution is a homogeneous mixture.

TRUE

A solution is made up of one solvent and of one or more solutes.

TRUE

Let’s Recall - TRUE or FALSE

Water is a universal solvent.TRUE

A saturated solution holds the maximum amount of solute in a solution.

TRUE

How would you describe this picture?

A B

Solution Concentration

Is one glass of tea stronger than the other?– What’s true about the “stronger” glass of tea?– How much tea does it have in it compared to

the other glass?

A B

Solution Concentration

Concentration – a ratio comparing the amount of solute to the amount of solution.

Many ways of expressing concentration:– percent by weight (% w/w)– percent by volume (% v/v)– parts per million (ppm) or parts per billion

(ppb) for very low concentrations– molality (m)– Molarity (M)

Concentrated vs. Dilute

The words “concentrated” and “dilute” are opposites.

EX: The dark tea is more concentrated than the light tea.

EX: The light tea is more dilute than the dark tea.

Concentrated vs. Dilute

Concentrated solution

Dilute solution

= solute particles

Achieved or Not?

Objectives:

1. Describe the concentration of solutions qualitatively and quantitatively.

2. Distinguish diluted solutions from concentrated solutions through a simple demonstration

If we are to arrange the bottles according to concentration, starting from diluted to the most concentrated solution, what would be the order of the bottles?

A EDCB

If we are to arrange the bottles according to concentration, starting from diluted to the most concentrated solution, what would be the order of the bottles?

A E DCB

Assignment:

1. Research and write the formula for computing the percentage per volume of a concentrated or diluted solution.