(DONE) Lab 5 Prep

Question 1

define: acids

Answer 1

• substances that generate H+ ions in solution

Question 2

define: bases

Answer 2

• substances that generate OH- ions in solution

Question 3

What do you call an acid base reaction that produces H2O? (2)

Answer 3

• neutralization

- proton- transfer reactions

Question 4

define: titration

Answer 4

• technique where a solution of known concentration is used to determine the concentration of an unknown solution

Question 5

State the equation for a hydrochloric acid that reacts with NaOH.

Answer 5

HCl (aq) + NaOH (aq) –> H2O (l) + NaCl(aq)

Question 6

What is the difference between the equivalence point and the end point of a titration?

Answer 6

• ratio of the reactants is in the amounts specified by the equation
• the point where the indicator just changes colour

Question 7

What is this labs indicator?

Answer 7

• phenolphthalein

Question 8

What will we use to precisely measure the amount of NaOH solution added?

Answer 8

• burette

Question 9

State the equation we will use in this lab

Answer 9

MbVb = MaVa

Question 10

Define: acclimatizing

Answer 10

• process where you rinse your equipment with the solution you will be analyzing

Question 11

When emptying the contents of a pipette into a flask, what should you remember to do?

Answer 11

• ensure the pipette tip touches the wall of the container

Question 12

define: titrant

Answer 12

• the solution in the burette

Question 13

What is the indicator for the endpoint in today’s reaction?

Answer 13

• the endpoint is reached when the solution turns pink and the pink color does not disappear after 30 seconds.