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Mariulka [41]
3 years ago
14

Suppose you wanted to monitor a pH change between 8.7 and 7.7. Which indicator would be most appropriate

Chemistry
1 answer:
mariarad [96]3 years ago
5 0

Answer:

Phenol red /

Thymol blue

Explanation:

pH indicator referred to halochromic chemical compound which is added in small amounts to a solution for the determination of pH visually.

An indicator can be described as a chemical detector for both hydronium and hydrogen ions as far as Arrhenius model is concerned, an indicator are usually weak acids or bases, and when they are which dissolved in water , there would be a dissociation process and ions is formed.

There are different types of indicator used in the laboratory depending on the pH values of the solution examples are thymol blue, bromothymol blue, thymol blue, phenolphthalein and methyl red

Thymol blue is an indicator that transit between red to yellow when the pH is between the range of 1.2–2.8 and also transit from from yellow to blue when the pH 8.0–9.6. It an indicator that usually have brownish-green or reddish-brown crystalline powder

Phenol red is pH indicator which is yellow in colour when it is below 6.8 pH and has a very bright pink colour when used with pH above 8.2

.

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Explanation:

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What name should be used for the ionic compound LiI?
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What name should be used for the ionic compound LiI?

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2 Holts
Luda [366]

A. They are the most destructive earthquake waves.

D. They can move in a rolling pattern through rock, like an ocean  wave.

Explanation:

Surface waves are seismic waves that cause the most destruction during an earthquake.

Rayleigh waves are known to cause rolling pattern of rocks just like an ocean waves.

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3 years ago
Add electron dots and charges as necessary to show the reaction of calcium and oxygen to form an ionic compound.
xxMikexx [17]
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<span>You start off with a neutral calcium atom with a shell of two electrons, a shell of 8 around that, a shell of 8 around that, and a shell containing 2...with no charge. </span>
<span>20 protons + 20 electrons. </span>

<span>You also have an oxygen atom with a shell of 2, and a shell of 6...with no charge. </span>
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<span>and an oxygen ion with 2 electrons added (to the outer shell), leaving a -2 charge (8 protons, 10 electrons). </span>

<span>Their electrostatic attraction causes them to come together to form an ionic compound of CaO in a crystal lattice.</span>
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