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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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What is normality in chemistry?​
Advocard [28]

Answer:

a measure of concentration equal to the gram equivalent weight per liter of solution.

Explanation:

Gram equivalent weight is the measure of the reactive capacity of a molecule. The solute's role in the reaction determines the solution's normality. Normality is also known as the equivalent concentration of a solution.

hope it helped

7 0
3 years ago
explain why the hydrogen atoms in a hydrogen gas molecule form nonpolar covalent bonds but oxygen and hydrogen atoms in water mo
marishachu [46]

Answer:

Explanation:

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.  

The atom with larger electronegativity attract the electron pair more towards itself and becomes partial negative while the other atom becomes partial positive.

Non polar covalent bond:

It is the bond where both bonded atoms share the pair of electron equally.

For example:

Hydrogen gas (H₂) is non polar covalent compound because the electronegativity of both bonded atoms are same. No poles are created that's why this is non polar covalent compound.

Polar covalent bond:

It is the bond where both bonded atoms share the pair of electron unequally.

For example:

In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive and bond is polar.

7 0
3 years ago
Metallic pan is provided with a wooden plastic handle give reason​
AlladinOne [14]

The metallic pan iis most likely going to be used on a stove.

The stove is heating something, and the conductive metallic pan will, well, conduct that heat throughout the entire body of the pan. Doing this will spread the heat to the handle, burning your hands.

Both wood and plastic are insulators, and they do not conduct heat or electricity. They will insulate your hands and protect them from the heat.

5 0
2 years ago
a rock is found to have a small amount of copper would you call the rock an ore of copper explain in 5-6 sentences
alexgriva [62]

Answer:

Answer: No. An ore is a rock having large amounts of a mineral. Minerals may or may not be commercially useful.

3 0
3 years ago
Calculate the molarity of each of the following
Alenkasestr [34]

Answer:

a. 1.21M

b. 0.119M

c. 0.00496M

Explanation:

Molarity, M, is an unit of concentration defined as the ratio between moles of solute and liters of solution:

a. 4.35 mol LiCl / 3.60L = 1.21M

b. 29.43gC6H12O6 * (1mol / 180.16g) = 0.1634moles / 1.37L = 0.119M

<em>Molar mass C6H12O6: 180.16g/mol</em>

c. 34.5mg NaCl = 0.0345g * (1mol / 58.44g) = 5.9x10⁻⁴moles / 0.1191L = 0.00496M

8 0
2 years ago
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