1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Arte-miy333 [17]
3 years ago
13

What are the limitations of litmus paper and phenolphthalein indicators? Name two other indicators that can be used that do not

have such limitations.
Chemistry
2 answers:
Luden [163]3 years ago
8 0

Answer:An indicator is usually is a weak acid in which the acid and base forms have different colours. Most indicators change colour over a narrow pH range.

Explanation:

(a) Litmus

Litmus is red in acid (< pH 5) and blue in base (> pH 8).

This is a rather wide pH range, so litmus is not much good in titrations.

However, the range is which it changes colour includes pH 7 (neutral), so it is good for distinguishing between acids and bases.

(b) Phenolphthalein

Phenolphthalein  is colourless in acid (< pH 8.3) and red in base (> pH 10).

This is a narrow pH range, so phenolphthalein is good for titrating acids with strong bases..

However, it can't distinguish between acids and weakly basic solutions.

It would be colourless in a strongly acid solution with pH =1 and in a basic solution with pH = 8.

(c) Other indicators  

Other acid-base indicators have the general limitations as phenolphthalein. Most of them have a small pH range, so they are useful in acid-base titrations.

The only one that could serve as a general acid-base indicator is bromothymol blue, which has a pH range of 6.0 to 7.6.

Read more on Brainly.com - brainly.com/question/12859414#readmore

ra1l [238]3 years ago
7 0

False reading may be obtained if there is a run over from adjacent reagent area in excessively wetted strips

Phenolphthalein only works efficiently from 4 to 10 ph

Litmus and phenolphthalein and methyl orange indicators can only allow you to tell if solution is alkaline,neutral or acidic

The two indicators with less limitations are methyl orange and thymol blue

You might be interested in
Molecular motion is a measure of the movement of the molecules in a substance. Molecular motion is substantially different betwe
Ainat [17]
The answer would be "air, wood". Gases have the highest Kinetic energy and least Potential energy. Liquids have the 2nd highest Kinetic energy and 2nd least potential energy and solids have the least kinetic energy and highest potential energy.
4 0
3 years ago
Read 2 more answers
What is the mass of 3.35 mol Hg(IO3)2? 1,700 g 1,840 g 1,960 g 2,110 g
vichka [17]

Answer:- 1840 g.

Solution:- We have been given with 3.35 moles of  and asked to calculate it's mass.

To convert the moles to grams we multiply the moles by the molar mass of the compound. Molar mass of the compound is the sum of atomic masses of all the atoms present in it.

molar mass of  = atomic mass of Hg + 2(atomic mass of I) + 6(atomic mass of O)

= 200.59+2(126.90)+6(16.00)

= 200.59+253.80+96.00

= 550.39 gram per mol

Let's multiply the given moles by the molar mass:

3.35mol(\frac{550.39g}{1mol})

= 1843.8 g

Since, there are three sig figs in the given moles of compound, we need to round the calculated my to three sig figs also. So, on rounding off to three sig figs the mass becomes 1840 g.



5 0
2 years ago
When the following equation is balanced, what is the coefficient for HBr?
deff fn [24]
D.) Balanced equation is Zn + 2HBr - - - > ZnBr2 + H2.
4 0
3 years ago
Dylan changed a formless pile of sand into a sand castle. What other natural materials can be changed into art
amm1812

Other natural material such as clay, wood, and stones can be changed into art.

Clay is pliable and is very easy to be molded into different shapes and sizes.

Wood can easily carved into different shapes, also different patterns can be easily etched on wood.

Stones of different variety and from different geological sources are painstakingly converted into statues or portraits of different life forms and scenery.

7 0
3 years ago
At which part of a river would you have the best luck growing food?
krek1111 [17]

Answer:

B. Delta

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • How does vegetation on river banks affects erosion
    6·1 answer
  • Which Group 14 element is classified as a metal?
    7·1 answer
  • What are some bad thing jellyfish do?
    12·1 answer
  • Which of the following best represents potential energy being converted to kinetic energy? (2 points) The chemical energy in a b
    14·2 answers
  • How many atoms are in c8h8o3?<br> Show your work
    6·1 answer
  • Which phase has the most space between the particles?<br> A.solid<br> B.gas<br> C.liquid
    6·2 answers
  • An unknown gas with a formula of HX is contained in a 25.0 L tank at 1.2 atm and 25.0 oC. What is the chemical formula of the ga
    14·1 answer
  • Bond length is the distance between the centers of two bonded atoms. On the potential energy curve, the bond length is the inter
    7·1 answer
  • In which two groups are mixtures classified? *
    12·1 answer
  • What's a household item that has  electrical energy
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!