HChem Chapter 19 Flashcards Preview

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Flashcards in HChem Chapter 19 Deck (22):
1

Characteristics of bases?
Taste, indicator, rxn with metals, conductivity, feel

Bitter, change in color, no, yes, slipper (soap)

2

Acids start with __

H

3

Acid- substance must contain H proton, must be able to produce H in solution through dissociation
Base- contain OH-, produce OH- in solution

Arrhenius

4

Acid- anything that donates an H+ proton
Base- anything that accepts an H+ proton (NH3)

Bronsted- Lowrey

5

Acid- electron pair acceptor
Base- electron pair donator

Lewis

6

What are the 7 strong acids

HCl, HBr, HI, HNO3, HClO4, HClO3, H2SO4

7

What are the 8 strong bases

LiOH, NaOH, KOH, RbOH, CsOH, Ca(OH)2, Sr(OH)2, Ba(OH)2

8

Name the following
HCl
HI
HNO4
HClO3
H2SO2
H2CO

Hydrochloric acid
Hydroiodic acid
Pernitric acid
Chloric acid
Hyposulfurous
Hypocarbonous

9

If you're finding the ph of something with a hydrogen concentration of 0.00125, how many sig figs would you have in your ph answer

Four (3 decimals places)

10

Molarity=

Moles of solid solute/L of solution

11

Explain the difference between a strong base and a weak base in terms of pH values AND hydroxide ion concentrations

A strong base is something like sodium hydroxide which is fully ionic. You can think of the compound as being 100% split up into metal ions and hydroxide ions in solution. The pH of a strong acid will have a smaller exponent and therefore be bigger.
The pH of a weak acid will have a higher exponent and be smaller
Only about 1% of a weak base produces hydroxide ions

12

When you add acid and water together, you _____ heat
Adding acid to water is preferably because water will absorb the energy, but if you add the acid first, the glass will absorb energy and heat will produce

Release

13

Ka of HCN

Ka= [H+][CN-]/[HCN]

14

Ka=

Concentration of products/concentration of reactants

15

When solving a Ka equation, always _____. If your answer is greater than 5 percent, use ___________ _______.

Assume, quadratic formula

16

A strong acid _________ completely

Dissociates

17

The majority of weak acids are __________

Organic (complex)

18

You do not need to show water with weak acids because it's molarity is _____

1

19

Always show water with weak bases ionizations because it acts as the _________ donator

Proton

20

The conjugate base will always be one more ____
While the conjugate acid will always be one more ______

Negative, positive

21

Characteristics of acids?
Taste, indicator, rxn with metals, conductivity, feel

Sour, change in color, up to H2, yes

22

Higher OH- concentration means ______ H+

Lower