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skelet666 [1.2K]
3 years ago
6

Salt has a chemical formula of NaCI. Is salt a pure substance or mixture? Explain.

Chemistry
1 answer:
algol [13]3 years ago
3 0
Salt is a mixture,salt is composed of sodium and chlorine,NaCI.Its a compound of two distinct elements that can not be broken down further without changing the properties of the substance.(I hoped that helped)
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Write a method that could be used to produce pure crystals of copper chloride from copper oxide and hydrochloric acid.
joja [24]

- Describe how you would make the salt from the reactants.

CuO + 2 HCl → CuCl₂ + H₂O

- Describe how you would purify the salt from the reaction mixture.

Filter the solution and let the product crystallize.

Explanation:

The reaction between copper oxide (CuO) and hydrochloric acid (HCl) will produce copper chloride (CuCl₂) and water:

CuO + 2 HCl → CuCl₂ + H₂O

-Describe how you would make the salt from the reactants

In a beaker which contain cooper oxide add the hydrochloric acid. To avoid working with concentrated hydrochloric acid, the acid may be diluted with water but make sure the add the stoechiometric amount (and a little bit of excess) in respect with the copper oxide.

-Describe how you would purify the salt from the reaction mixture.

Let the reaction proceed and then filter the solution to remove the unreacted cooper oxide.

Let the filtered solution, which contain copper chloride, water and unreacted hydrochloric acid, to stand undisturbed for several days. You may see the crystals growing from the solution. To speed up the process you may reduce the temperature.

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purifying compounds

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g The first step in the process is to calibrate the grating, so we know the grating spacing (the distance between the openings i
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Answer:

The grating spacing is  d = 1055nm

Explanation:

From the question we are told that

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Generally in grating grating the condition for maxima   to occur is  

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