pH / Solution Concentration

Question 0

What equation is used to find the number of grams necessary to achieve one equivalent per liter of solution?

Answer 0

g/eq= (molar mass)
______________
(#positive charges)

Question 1

What formula is used to find the amount of stock solution needed?

Answer 1

C1V1 = C2V2

1= original stock

Question 2

How to calculate the pH of a solution

Answer 2

pH= -log(H+)

Question 3

How to find the pH of an OH solution

Answer 3

pOH= -log(H+)

Then subtract the answer from 14

14- -log(H+)

Question 4

Label the acid, base, conjugate acid, and conjugate base:

HA(aq) +H2O(l) –> H3O(aq) + A (aq)

Answer 4

HA (aq)= acid
H2O (l)= base
H3O+ (aq)= conjugate acid
A- (aq)= conjugate base

Question 5

How do you calculate the (H+) concentration of a solution?

Answer 5

(H+) = 10^(-pH)

Question 6

How do you calculate the (OH-) concentration of a solution?

Answer 6

14- pH= pOH –> (OH-)= 10^(-pOH)

Question 7

How did Arrhenius define an acid and a base?

Answer 7

• Acid= produces hydrogen ions in an aquius solution

* base= produce hydroxide ions

Question 8

How did Brønsted-Lowry define and acid and a base?

Answer 8

• acid= proton donor

* base= proton acceptor

Question 9

How did Lewis define and acid and a base?

Answer 9

• acid= electron-pair acceptor

* base= electron-pair donor

Question 10

What the the general formula for pH and pOH

Answer 10

pH + pOH = 14

Question 11

What is 1 molar solution?

Answer 11

1 molar solution= 1 mole of solute per liter of solution

Question 12

True or false: units are needed when calculating pH

Answer 12

False

Question 13

When calculating pH and concentrations, what do you round to?

Answer 13

The number of DECIMAL PLACES, NOT the number of significant digits

Question 14

When calculating the OH-, what is the unit used?

Answer 14

M (molar)

Question 15

What are some properties of molecular hydrogen?

Answer 15

• colorless
• odorless
• tasteless
• gas at STP
• flammable
• insoluble in H2O