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Trava [24]
3 years ago
12

What chemical change occurred in the following reaction? Mg2+(aq)+2OH−(aq)⟶ Mg(OH)2(s)

Chemistry
2 answers:
irina1246 [14]3 years ago
6 0
I think it might be a gas was formed.
Hope I'm right and it helps you out!!
7nadin3 [17]3 years ago
3 0

Answer : When magnesium salts combine with the alkaline water it induces precipitation of solid Mg(OH)_2.

Explanation :

  • Chemical change : The chemical change occurs when a substance combine with the another substance to form a new substance.

         It can not be easily reversible.

        The new product is formed or precipitate may be formed.

  • Physical change : The physical change occurs when a substance combine with the another substance then no new compound is formed.

        It can be reversible.

       No new product is formed only changes occurs in the state or                 phase.

As per question, when magnesium salts combine with the alkaline water it induces precipitation of solid Mg(OH)_2.

The balanced chemical reaction is,

Mg^{2+}(aq)+2OH^-(aq)\rightarrow Mg(OH)_2(s)

That mean a new compound is formed by this reaction. So, the chemical change occurred in this reaction.

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Consider this initial-rate data at a certain temperature for the reaction described by N2O3(
Yuliya22 [10]

<span><span>N2</span><span>O3</span><span>(g)</span>→NO<span>(g)</span>+<span>NO2</span><span>(g)</span></span>

<span><span>[<span>N2</span><span>O3</span>]</span> Initial Rate</span>
<span>0.1 M     r<span>(t)</span>=0.66</span> M/s
<span>0.2 M     r<span>(t)</span>=1.32</span> M/s
<span>0.3 M     r<span>(t)</span>=1.98</span> M/s

We can have the relationship:

<span>(<span><span>[<span>N2</span><span>O3</span>]/</span><span><span>[<span>N2</span><span>O3</span>]</span>0</span></span>)^m</span>=<span><span>r<span>(t)/</span></span><span><span>r0</span><span>(t)
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</span></span></span>([N2O3]/[N2O3]0) = 2

Also, we assume m=1 which is the order of the reaction.

Thus, the relationship is simplified to,

r(t)/r0(t) = 2

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<span>k=6.6</span> <span>s<span>−<span>1</span></span></span>

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