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san4es73 [151]
3 years ago
15

30 POINTS!

Biology
1 answer:
vagabundo [1.1K]3 years ago
5 0
The answer is D 2 long and 2 short
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Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. W
liubo4ka [24]

If referring to the question: Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. What was the best compound to add to make it pH=6?

A) KOH

B) HCL

C) Water

D) No answer provided

Then the correct answer would be option B, to add HCL, known as Hydrochloric acid to lower the pH to 6.

In science, pH is a scale used to measure the acidity of a solution or its basicity. The scale ranges from 0 to 14. A pH of 7 would mean that the given solution is neutral, lower than 7 equates to an acidic solution, while anything above 7 becomes increasingly basic.

Option A is to add KOH, or potassium hydroxide to the original solution whose starting pH is 8. KOH is a solution whose pH is above 8,  a strong base, and is often used to increase the pH of a solution. In the question it states what the desired pH is 6, therefore we want to lower, not increase the pH. This makes option A incorrect.

Water is a neutral solution. Even though it is neutral, it is not used to neutralize basic or acidic solutions. Acid or bases may be added to water to create very diluted solutions that are nearly neutral despite containing a strong base or acid, but this is a different process than neutralization and will not give the desired pH. Option C is also wrong.

Option B is correct because HCL, known as hydrochloric acid is a strong acid, commonly used to lower the pH of a solution by increasing the concentration of hydrogen ions. Since we start with a pH of 8 and wish to achieve a pH of 6, HCL is the correct component to add to the solution. Due to option B being correct, option D that states that no answer is provided, is incorrect.

For more on pH visit:

brainly.com/question/491373?referrer=searchResults

8 0
3 years ago
Explain how human activity, pollution, and acid rain are all related to each other
ICE Princess25 [194]
All of those can potentially harm the earth. Human activity is a cause of pollution, and pollution is the cause of acid rain to some extent.
3 0
3 years ago
PLS HELP BEFORE I DROP OUT
irakobra [83]

Answer:

most likely d, she's a chemist so she works with chemicals and substances akin to them

8 0
2 years ago
Read 2 more answers
Imagine yourself in a dark classroom reading PowerPoint slides. If an audience member were to check the internet using her cell
Arturiano [62]
The answer is Weber's law
6 0
3 years ago
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The one-toed horse of today steadily evolved from its five-toed ancestor.​
Vesnalui [34]

Answer:

It is true that one-toed horse of today steadily evolved from its five-toed ancestor.​

Explanation:

  • Evolution is the law of nature.There is a continuous process of evolution in each biological species in nature.
  • Similarly, horses had 5 toes millions of year back, but according to the theory of gradualism their use decreased and toes started fusing.
  • Now, its only one toe at present but the vestigial left over provides the solid evidence for the fact that horses had 5 toes in the past.
6 0
3 years ago
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