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Hatshy [7]
3 years ago
10

What is the name for the point at which the indicator changes color in a titration? turning point end point indicator point colo

r point NextReset
Chemistry
2 answers:
Sedaia [141]3 years ago
8 0
It says on google
<span>An acid-base indicator (e.g., phenolphthalein) changes color depending on the pH. Redox indicators are also frequently used. A drop of indicator solution is added to the titration at the start; when the color changes the endpoint has been reached, this is an approximation of the equivalence point.</span>
Aloiza [94]3 years ago
8 0

Answer:

End point

Explanation:

Titration is a method of quantitative analysis which is employed to determine the concentration of unknown solutions.

Here a titrant of known concentration is added to a given volume of an analyte solution along with a suitable indicator. The titrant is added gradually until a color change in the analyte is observed. This point is known as the end point.

The end point is usually approximated as the equivalence point wherein the moles of titrant consumed equals the moles of analyte present.

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What happens to the temperature and density of the material between points B and C?
makvit [3.9K]

Answer:

Temperature decreases and density increases

Explanation:

Let us remember that density of a material increases as the temperature of the material decreases. So the cooler a material becomes, the denser it becomes also.

Between points B and C, the material rapidly cools down and the temperature decreases accordingly. This ultimately results in an increase in density since cooler materials are denser than hot materials.

7 0
3 years ago
Among these element groups, which is least likely to form ions?
cupoosta [38]

Your answer would be 7A

3 0
3 years ago
The melting point of h2o is 0 degrees celsius. this is the same as its:
professor190 [17]
This is the same as its freezing point

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6 0
3 years ago
What can a drop of liquid mercury be described as?
Tomtit [17]
A drop of iquid mercury is D. <span> a pure substance and an element. This is because mercury is an element which exists as liquid in the normal or standard conditions. It is a metal that is toxic to all environments. It is pure because it is composed only of one kind of substance.</span>
8 0
3 years ago
Read 2 more answers
7. Balance the following reaction under basic conditions: Al (s) + Cr2O72- (aq) -&gt; Al3+ (aq) + Cr3+ (aq)
MArishka [77]

The free energy change of the reaction; Fe (s) + Au3+ (aq) -> Fe3+ (aq) + Au (s) is calculated to be -443.83KJ/mol.

For the reaction shown in question 7, we can divide it into half equations as follows;

Oxidation half equation;

6 Al (s) -------> 6Al^3+(aq) + 18e

Reduction half equation;

3Cr2O7^2-(aq) + 42H^+(aq)   + 18e -----> 6Cr^3+(aq) + 21H2O(l)

The balanced reaction equation is;

6Al(s) + 3Cr2O7^2-(aq) + 42H^+(aq)   -----> 6Al^3+(aq) + 6Cr^3+(aq) + 21H2O(l)

The E° of this reaction is obtained from;

E° anode = -0.04 V

E°cathode = +1.50 V

E° cell = +1.50 V - (-0.04 V) = 1.54 V

Given that;

ΔG° = -nFE°cell

n = 3, F = 96500, E°cell = 1.54 V

ΔG° = -(3 × 96500 × 1.54)

ΔG° = -443.83KJ/mol

Learn more: brainly.com/question/967776

4 0
2 years ago
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