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10 months ago

Mg + 2H2O -----> Mg (OH)2 + H2 Write it in word problem

1 answer:

3 0

The word problem format to the task given above is: When magnesium reacts with steam, it produces magnesium hydroxide and liberate hydrogen gas.

<h3>How magnesium hydroxide is formed?</h3>

It happens that magnesium is an alkali earth metal and react with water in the gaseous state to librate hydrogen gas, when this reaction occurs, it results in the formation of magnesium hydroxide.

The chemical equation between magnesium and water is given below:

Mg + 2H₂O -----> Mg (OH)₂ + H₂

So therefore, we can accurately deduced that magnesium hydroxide is produced when magnesium is disolved in water.

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3 years ago

Titration is a type of experiment that can be performed to investigate a neutralization reaction. The equivalence point is when

Rom4ik [11]

Answer:

74.0 mL

Explanation:

In the equivalence point we have:

$n_{a} = n_{b}$

Where:

$n_{a}$ is the number of moles of the acid

$n_{b}$ is the number of moles of the base

$M_{a}V_{a} = M_{b}V_{b}$

Where M is the concentration and V is the volume

Hence the volume of the base is:

$V_{b} = \frac{M_{a}V_{a}}{M_{b}} = \frac{1.50 M*43.6 mL}{0.884 M} = 74.0 mL$

Therefore, is needed 74.0 mL of the potassium hydroxide solution to reach the equivalence point.

I hope it helps you!

4 0

3 years ago

Which of the following is a definition of a base? O a. behaves as a catalyst. O b. accepts H ions from acids. Oc. turns cloudy w

yan [13]

Answer: b. accepts $H^+$ ions from acids

Explanation:

According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions $(OH^-)$ when dissolved in water and an acid is defined as a substance which donates hydronium ions $(H_3O^+)$ in water.

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates $H^+$ ions and a base is defined as a substance which accepts $H^+$ ions.

$NH_3+H_2O\rightarrow NH_4^++OH^-$

Here water is donating $H^+$ ions, and thus act as acid and ammoia $NH_3$ is accepting $H^+$ ions from water and thus is a base.

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

Thus base is a substance which accepts $H^+$ ions from acids.

5 0

3 years ago