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2 years ago

What is the significance of wanting to know what the pH of a solution is?

1 answer:

4 0

pH is an important parameter for many reactions to take place in solution and in biological systems. It is related to the concentration of H⁺ ions through the following expression:

pH = 1/[H⁺] = -log [H⁺]

Wanting to know the pH of a solution is equivalent to knowing the amount of hydrogen ions present. But the pH scale is more convenient than the concentration scale because pH usually takes values between 0 and 14.

When pH < 7 the solution is acid.
When pH = 7 the solution is neutral (like pure water).
When pH > 7 the solution is basic.

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Which statement describes a difference between the humid continental and subarctic climates?

-BARSIC- [3]

Answer:

The humid continental climate has hot summers, while the subarctic climate has short, cool summers.

Explanation:

I did the lesson already and got it correct lol

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2 years ago

Enlist any four examples of chemical change ?

masha68 [24]

Answer:

heat

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2 years ago

Read 2 more answers

I’ll $ashapp anyone who knows the answers to these!!! Leave your $tag

kvv77 [185]

Answer:

below

Explanation:

1. The areas that have latitudes which are closer to the equator are generally hotter than those areas that are closer to the north and south poles.

2. Temperature is inversely related to latitude, as latitude increases from the equator (moving north or south) the temperature decreases.

Hope this helps! best of luck <3

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1 year ago

Why does every chemical reaction require a certain amount of activation energy?

Margaret [11]

Answer:

Forming the activated complex requires energy.

Explanation:

4 0

2 years ago

Create the Lewis structure of CF4. NOTE: do only the step asked for in each part and then click Check–don't work ahead to solve

Naya [18.7K]

To create the Lewis structure we need to take into account the octet rule: atoms tend to gain, lose or share electrons to complete their valence shell with 8 electrons.

C belongs to Group 4A in the periodic table so it has 4 valence electrons. It needs to share 4 pairs of electrons to complete the octet.

F belongs to Group 7A in the periodic table so it has 7 valence electrons. Each F needs to share 1 pair of electrons to complete the octet.

As a consequence, in CF₄, C will form a single bond with each F and all the octets will be complete.

5 0

2 years ago