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Flashcards in Unit 4 – Solutions Deck (43)
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1

what is a solution made up of?

solution = solute + solvent

2

what is it called when water is the solvent?

an aqueous solution

3

define solubility

The maximum out of solute that will dissolve in a known amount of solvent

4

define precipitate

A solid substance it appears when 2 solutions are mixed or

a decreasing solubility

5

in the Chemical equation the compound with a low solubility is

The precipitate

6

what happens when in a chemical equation both compounds have a high solubility?

no precipitate occurs

7

solute formation

there are attractions between

two solute particles

two solvent particles

solute particles and solvent particle

8

what are the three intermolecular forces?

dipole dipole

London forces

hydrogen bonding

9

how do you prepare a volumetric flask or Erlenmeyer flask?

Tapwater Then rinse with deionized water

10

how do you prepare a beaker?

rinse with tap water then deionized water and then dry

11

how do you prepare a pipette or buret?

rinse with tapwater, deionized water, condition

12

why do you condition?

The deionized water left in the equipment will dilute the concentration of the solution

13

define solution and example

A homogeneous mixture (one phase) that is uniform throughout (looks like a pure substance)

example air oxygen nitrogen brass copper and zinc

14

Element

A pure substance that is composed of one kind of atom listed on the periodic table example H

14

compound

two or more elements chemically combined in fixed proportions example H2O

15

mixture

A mixture is made up of two or more different kinds of particles

16

solution and example

A homogeneous mixture (only one phase) that is uniform throughout (looks like a pure substance) example air 02, N2 and brass (copper zinc)

17

mechanical mixture

A heterogeneous mixture (has two or more phases)
example oil and water

18

phase

a visibly distinct region

19

what are the three types of percentage concentration?

percent v/v
percent w/v
percent w/w

20

what is the formula for percent volume volume

mL of solute over 100 mL of solution

21

what is the percentage concentration formula of weight weight?

grams of solute over 100 g of solution

22

what is the equation for parts per million?

units of solute over 1,000,000 units of solution

23

high solubility

can form a solution with the concentration of greater than or equal to 0.1 moles per litre

24

Low solubility

The solute cannot form a solution with the concentration of 0.1 moles per litre

25

what makes a solute dissolve or not dissolve?

The attractions between two solute particles
to solvent particles
solute particle solvent particle

26

The stronger the attraction the lower the solubility

d

27

what happens during Dipole Dipole?

there is an attractive force between oppositely charged ends of polar molecules

28

what happens during London forces?

it is in all molecules
one electron suddenly moves to one side of the Atom

29

what happens during hydrogen bonding?

hydrogen bonding occurs in Atoms with high electronegativity values and a slightly positive hydrogen (F, O, N)

if it did not occur all water on earth would be a gas