What type of blood vessel returns blood to the heart?

Know what makes a solution acidic or basic (the pH number and the ions).

Brrunno [24]

To determine whether an acidic or basic solution, it is first necessary to compare the concentrations of the hydronium (H3O +) and hydroxide (OH-) ions in the solution.

In acidic solution, the concentration of H3O + ions is higher than that of OH- ions.

In acidic solution, the concentration of H3O + ions is higher than that of OH- ions. Such a solution can be achieved by adding a small part of the H3O + ions, for example. Acid solutions have a pH below 7, the further away from 7 the pH of the solution is the higher its acidity content. According to Le Chatelier's principle, when a disturbance is caused to an equilibrium system, it tends to readjust in order to diminish the effects of that force. This means that if an acid is added to water, the H3O + ions will be in excess and the equilibrium will shift in the opposite direction to the left. Then these excess ions will react with the OH- ions. Thus, the concentration of OH- ions will decrease and the solution will become acidic.
In basic solutions, the concentration of OH- ions is higher than that of H3O + ions. If we add a base to the water, it means that we will be adding OH- ions and, as explained in the previous section, by Le Chatelier's principle, the equilibrium of the water selfionization reaction will shift in the opposite direction, and the excess ions will react. with the H3O + ions, decreasing their concentration and making the basic solution. Basic solutions have a pH greater than 7, the farther from 7 and closer to 14 the pH of the solution, the higher the basification content.

8 0

3 years ago

Which of the following is NOT correctly matched with the organ system.

UkoKoshka [18]

Answer:

The correct answer is

A. Anxiety- Nervous system

Explanation:

Anxiety has nothing to do with the Nervous system; the nervous system is the nerves in your body and is not what makes you nervous or anxious. All the other answer choices are correct.

4 0

3 years ago

19. What's evaluated at the G2 checkpoint in mitosis and meiosis?

Vedmedyk [2.9K]

Answer:

D

Explanation:

The G2/M check point makes sure that all of the chromosomes have been replicated.

- Is all DNA replicated?

- Is all DNA damage repaired?

5 0

3 years ago

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A paramecium moves by means of _______________ . feet tiny hairs reproduction

____ [38]

A paramecium moves by mean of - cilia a tiny living thing found in water is a single* cell shaped like a slipper and moves by means of cilia,

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<h3>Hope this helps you❤!!</h3><h3 />

8 0

3 years ago

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Explain how the data from the river samples showed that there was a problem with the water treatment plant.

Agata [3.3K]

Answer:

The water treatment plant does not work properly.

Explanation:

The data from the river samples showed that there was a problem with the water treatment plant because there is high amount of pollutants are present in the river sample. The presence of pollutants in the samples shows that the water treatment plant did not work properly, if they did no pollutants are present in the river water so this presence of pollutants indicates inefficiency of water treatment plant.

5 0

3 years ago