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Gennadij [26K]
3 years ago
7

Finely ground nickel (II) hydroxide is placed in a beaker of water. It sinks to the bottom of the beaker and remains unchanged.

An aqueous solution of hydrochloric acid is then added to the beaker and the Ni(OH)2 disappears. Which reaction best describes what occurred in the beaker?
Your answer:

Ni(OH)2 (s) + HCl (aq) → NiO (aq) + H2 (g) + HCl (aq)

Ni(OH)2 (s) + 2 HCl (aq) → NiCl2 (aq) + 2 H2O (l)

Ni(OH)2 (s) + 2 H2O (l) → NiCl2 (aq) + 2 H2O (l)

Ni(OH)2 (s) + 2 H2O (l) → NiCl2 (aq) + 3 H2O (l) + O2 (g)
Chemistry
1 answer:
Luden [163]3 years ago
6 0

Explanation:

Acid-base reaction will give salt and water.

The 2nd option is correct.

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3. A student carries out the clay-catalyzed dehydration of cyclohexanol starting with 10 moles of cyclohexanol and obtains 500 m
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49.45~%

Explanation:

In this case, we have to start with the <u>chemical reaction</u>:

C_6H_1_2O~->~C_6H_1_0~+~H_2O

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500~mL\frac{0.811~g}{1~mL}=405.5~g

Finally, with these values we can calculate the <u>yield</u>:

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See figure 1

I hope it helps!

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