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vekshin1
3 years ago
7

Why do we need to standardize EDTA in determination of water hardness?​

Chemistry
1 answer:
bonufazy [111]3 years ago
3 0
Standardized means that a specific amount EDTA is added to a specific volume of distilled water. Water hardness is determined by the the amount of a standard EDTA solution to change the color of the water from red to blue. For example if one added the correct amount of EDTA to twice the volume of distilled water the solution would be weak. Titration of the hard water would give a erroneous high result.
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How many atoms are 0.750 moles of zinc?
Darya [45]
<span>.750 moles X (6.02 x10^23 atoms/1 mol)= 4.52 X 10^23 atoms is the answer </span>
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Substance X has a fixed volume, and the attraction between its particles is strong. Substance Y has widely spread out particles
ycow [4]

Answer: Option (d) is the correct answer.

Explanation:

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Whereas in plasma, molecules are hot ionized which include positively charged ions and negatively charged electrons. They collide much more rapidly with each other and are widely spreaded out.

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6 0
2 years ago
Read 2 more answers
Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric ac
gregori [183]

The coefficient for sulfuric acid wen reaction between calcium phosphate and phosphoric acid  occurs is

three (3)

<h2>explanation</h2>

write a balanced chemical equation for the reaction

that is

Ca3(PO4)2 + 3 H2SO4 →2 H3PO4 + 3CaSO4

since coefficient is number in front of a chemical formula  the coefficient of H2SO4 is 3

8 0
3 years ago
Help Please..... Points Available!<br>I will give brainliest!!
patriot [66]

Answer:

I think Its B

Explanation:

4 0
3 years ago
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How many particles are in chemicals
stepan [7]

Answer:

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One mole is 6.022 x 10^23 of the microscopic particles which make up the substance in question.

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