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Aleks [24]
3 years ago
7

Why are silver, lead, and mercury so special? (why do they always precipitate out and never dissolve) PLEASE BE DETAILED BUT SIM

PLE
Chemistry
1 answer:
lara [203]3 years ago
8 0
Silver and lead are special elements, where silver is insoluble in all halogen anions (like AgCl, AgI, AgBr)
and lead is insoluble in sulphates and halogen anions ( PbSO4, PbCl2, etc.)
Mercury is special because it is the only metal that is a liquid at room temperature
hope this helps!!
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Cohesion, adhesion, and surface tension are characteristics of water that ________. increase when pH increases increase when tem
Ray Of Light [21]

Answer:

are a result of hydrogen bonding.

Explanation:

The <em>surface tension</em><em> is the amount of energy required to stretch or increase the surface of a liquid by a unit area</em>. <u>Liquids that have strong intermolecular forces also have high surface tensions.</u> Thus, because of hydrogen bonding, water has a considerably greater surface tension than most other liquids.

Another example of surface tension is capillary action. A thin film of water adheres to the wall of the glass tube. The surface tension of water causes this film to contract, and as it does, it pulls the water up the tube. Two types of forces bring about capillary action.

One is <em>cohesion</em><em>, which is the intermolecular attraction between like molecules (in this case, the water molecules)</em>. The second force, called <em>adhesion</em><em>, is an attraction between unlike molecules, such as those in water and in the sides of a glass tube</em>. If adhesion is stronger than cohesion, the contents of the tube will be pulled upward. This process continues until the adhesive force is balanced by the weight of the water in the tube.

This <u>characteristics of water are a consequence of a particularly strong type of intermolecular attraction, called the </u><u>hydrogen bond</u><u>, which is a special type of dipole-dipole interaction between the hydrogen atom in a polar bond, such as N-H, O-H, or F-H, and an electronegative O, N, or F atom.</u>

8 0
3 years ago
Is H2O+CO2 = H2CO3 a redox reaction? How?
Dafna1 [17]

Answer:

It is not an oxidation-reduction reaction. The formation of carbon dioxide and water are redox reactions which involve the oxidation of carbon and hydrogen respectively with oxygen being reduced in both the case.

Explanation:

3 0
4 years ago
When HCl is added to water, the [H3O+] = 0.6 M. What is the [OH-]?
makkiz [27]

Answer:

The answer is

<h2>[OH-] = 1.66 × 10^-14 M</h2>

Explanation:

To find the [OH-] we must first find the pH and the pOH of the solution

That's

pH + pOH = 14

pOH = 14 - pH

To find the pH we use the formula

pH = -log [H3O+]

From the question

[H3O+] = 0.6 M

pH = - log 0.6

pH = 0.22

pOH = 14 - 0.22

pOH = 13.78

We can now find the [OH -] in the solution using the formula

pOH = - log [OH-]

13.78 = - log [OH-]

Find the antilog of both sides

We have the final answer as

<h3>[OH-] = 1.66 × 10^-14 M</h3>

Hope this helps you

3 0
4 years ago
Changing the number of protons in an atom makes<br><br> A. an ion<br> B. an isotope
lana [24]
A. an ion

The atom gains a net electrical charge if the number of protons and electrons are not equal which makes it an ion.
5 0
3 years ago
Which electron configuration represents the element carbon
Arisa [49]

Answer:

Carbon has an electronic configuration of 2,4

5 0
4 years ago
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