titration

Question 1

what are titrations used for

Answer 1

to determine the concentration of an unknown solution by reacting it with a solution of known concentration (titrant).​

Question 2

advantages of titration

Answer 2

accurate
relatively simple
inexpensive

Question 3

what are limitations of titrations

Answer 3

• requires a reaction with a clear endpoint
• not suitable for all types of solution

Question 4

what is it used for

Answer 4

check the concentration of acids, bases, or nutrients in animal feed and water to ensure safety and effectiveness.

Question 6

what is a titration

Answer 6

delivering a measured volume of a solution of known concentration into the solution being analysed

Question 7

what is a titrant

Answer 7

a standard solution

Question 8

what is the “end point” in titration

Answer 8

an observable point at which the reaction appears to be complete, this is marked by a colour change from the indicator. Its the point reached when enough titrant has been added to react with all the solution being analysed.

Question 9

what colour is methyl orange in an alkali solution

Answer 9

yellow

Question 10

name a weak acid that is used as an indicator

Answer 10

phenolphthalein

Question 11

what does titration determine

Answer 11

the concentration of an unknown solution

Question 12

what is the equivalence point in titration

Answer 12

the theoretical point where exactly the right amount of indicator has been added to completely react. no excess acid or base is leftover so the reaction is chemically complete

Question 13

what colour is methyl orange in an acid solution

Answer 13

red

Question 14

what type of titration is methyl orange best for

Answer 14

strong acid vs weak base

Question 15

what colour is Phenolphthalein in acid

Answer 15

colourless

Question 16

what colour is Phenolphthalein in base

Answer 16

pink

Question 17

what type of titration is Phenolphthalein best for

Answer 17

strong base vs weak acid

Question 18

which indicator is closer to the equivalence point in a strong acid, strong base titration

Answer 18

penophthalein

Question 19

what is the scientific name for the unknown solution

Answer 19

analyte

Question 20

what is the equivalence point

Answer 20

the theoretical point where exactly the right amount of titrant has been added to completely react with the analyte in a 1:1 mole ratio. when there is no acid or base left over and the reaction is complete. this is similar to the end point but not quite the same due to the end point shown by the indicator not being exactly at this spot

Question 21

what Is an indicator

Answer 21

substances that change colour at specific ph values, helping to identify the endpoint of a titration

Question 22

how would you use a ph meter in titration

Answer 22

as titrant is added, the pH is electronically recorded after every addition. the equvalence point appears as a sharp chance in ph.

Question 23

what are advantages of using a ph meter

Answer 23

• accurate and precise
• useful for weak acid / base titrations where the colour change may be unclear
• good for finding exact equvanlence point

Question 24

what is the calculation for concentration intitration

Answer 24

C1 x V1 = C2 x V2

C1 = conc of solution 1 (mol/L or g/L)
V1 = volume of solution 1 (L or cm3)
C2 = conc of solution 2
V2 = volume of solution 2

Question 25

what is the ratio of moles of acid to moles of bases at neutralisation

Answer 25

1:1

Question 26

what happens if the balanced equation shows different mole ratios

Answer 26

you must first adjust the calculation

Question 27

what is the equation in a 1:2 concentration ratio

Answer 27

C1 x V1x1 = C2 xV2x2 1 : 2

Question 28

what is the equation for the concentration of C2

Answer 28

C1 x V1 _________ V2

Question 29

what is V1 when doing titration

Answer 29

the amount of solution used from buirette after titration

Question 30

what is an endpoint in titration

Answer 30

observable point at which the reaction appears to be complete

Question 31

what's the equivalence point

Answer 31

theoretical point in which the exact right amount of titrant has been added to completely react with the analyte in a 1:1 ratio. there is no excess acid or base, the reaction is chemically complete

Question 32

what is the colour change range of methyl orange

Answer 32

3.1 - 4.4

Question 33

what is the colour of methyl orange in acid

Answer 33

red

Question 34

what is the colour of methyl orange in base

Answer 34

yellow

Question 35

what type of titration is methyl orange best for

Answer 35

strong acid - weak base

Question 36

what is the colour change range of phenolphthalein

Answer 36

8.3 - 10.0

Question 37

what is the colour of phenolphthalein in acid

Answer 37

colourless

Question 38

what is the colour of phenolphthalein in base

Answer 38

pink

Question 39

what type of titration is phenolphthalein best for

Answer 39

strong base, weak acid