Lecture 5 done

Question 1

What is a solution?

Answer 1

homogeneous mixture of two or more substances

Question 2

How can solutions and dispersions be distingushed?

Answer 2

Light scattrng. Dispersions are usually cloudy

Question 3

What is concentration?

Answer 3

amount of substance/unit of measure

Question 4

What is isotonic?

Answer 4

Concentration is equal inside and outside the cell

Question 5

What is hypertonic?

Answer 5

Concentration outside cell is greater causing cell to shrink

Question 6

What is hypotonic?

Answer 6

Cancentration outside cell is low, causing cell to expand.

Question 7

what is molarity?

Answer 7

moles of solute is 1 L of solution

Question 8

What is molality?

Answer 8

moles of solute/ 1000 g solvent

Question 9

mole fraction

Answer 9

moles/total moles

Question 10

percent by weight

Answer 10

%w/w, grams of solute/100g solution

Question 11

percent weight in volume

Answer 11

%w/v, grams of solute/100mL solution

Question 12

Which concentrations change with temperature?

Answer 12

%w/v, %v/v, M