Titration Calculation

Question 1

What are titrations used for?

Answer 1

To determine an unknown concentration of a solution

Question 2

What is the unit for concentration?

Answer 2

Mol/Dm^3 or Mol/L

Question 3

How is concentration like a ratio in how it’s measured versus actual substance concentrations

Answer 3

The concentration measurement is, if there were 1 dm^3 or liter of that substance, It would have X moles in that one decimeter/liter and it’d be proportionally the same as the actual substance amount and it’s concentration

Question 4

What tools are used for measuring titration?

Answer 4

Conical flask, Burette, and pipettes (usually)

Question 5

What are the usual pHs of the two substances being added together in titration

Answer 5

An acid and a base (Or alkali)

Question 6

What is usually the formula for the equation of the reaction of two substances in titration?

Answer 6

Acid + Base = Salt + Water

Question 7

Titre volume = ?

Answer 7

Start volume - End volume

Question 8

What is concentration?

Answer 8

The amount of dissolved solute (added into solvent) per unit volume of solution (Usually dm^3 or liters)

Question 9

What is a solution?

Answer 9

Solute dissolved in solvent (Usually something dissolved into water)

Question 10

What is a first time titration that is likely to be an inaccurate result called?

Answer 10

Rough titration

Question 11

What is more than one titration in 2 to 3 trials (w/ rough) and is usually more “accurate” than rough titrations

Answer 11

Accurate titrations

Question 12

What are state symbols?

Answer 12

Symbols that tell what state of matter a substance is in (Ex. (s) for solid or (g) for gas)

Question 13

What is one of the most important things to have in chemistry, labs, and chem tests?

Answer 13

A nice, clean looking table w/ data on it

Question 14

How is a burette usually read in titration?

Answer 14

To the nearest half a scale, usually ending w/ 0.00 or 0.05 (Ex. 23.20 or 23.25 cm^3)

Question 15

How do you actually look at a burette?

Answer 15

Crouch and line eyes with bottom of concave, or downward bent, water surface

Question 16

What is meniscus?

Answer 16

A concave curve at the top of a substance in a titration device with a substance in it. It’s caused by surface tension and adhesion

Question 17

What is the requirement for all accurate titration values?

Answer 17

They all need to be precise and be close in value ( Needs to be within 0.10cm^3 within each other )

Question 18

The formula to find concentration

Answer 18

Moles/Volume (dm^3 or cm^3)

Question 19

The formula to find moles

Answer 19

M = concentration/volume (M = Mass/ molecular mass..?)

Question 20

What type of analysis is a Titration lab/experiment?

Answer 20

Quantitative analysis

Question 21

How do you find the average titre?

Answer 21

Add up all of the Titre volumes and divide them by the number of trials done (Titre volume/# of trials)

Question 22

Converting volume from Cm^3 to Dm^3?

Answer 22

Divide the value by 1000 (Ex. 25.0/1000 = 0.0025)

Question 23

M = Mr x Mol could also be what?

Answer 23

M = Mr x (Concentration x Volume)