How many liters of oxygen are liberated when 39.2 grams of barium chlorate are heated to produce barium chloride and oxygen gas?

1 answer:

8 0

<span>Potassium chlorate is a rich source of oxygen It decomposes upon heating to produce potassium chloride and oxygen.</span>

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Cerrena [4.2K]

What grade is this fora.

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It was calculated that 4.3mL of 0.417 M HCl is required to titrate 11.9 mL of 0.151 M Mg(OH)2. Show evidence 2 HCl(aq) + Mg(OH)2

Lapatulllka [165]

Answer:

See explanation.

Explanation:

Hello,

In this case, for the described chemical reaction:

2 HCl(aq) + Mg(OH)2(aq) → MgCl2(aq) + 2 H2O(l)

We can notice there is a 2:1 molar ratio between the moles of hydrochloric acid and magnesium hydroxide, therefore, at the equivalence point:

$n_{HCl}=2*n_{Mg(OH)_2}$

And in terms of volumes and concentrations we verify:

$V_{HCl}M_{HCl}=2*V_{Mg(OH)_2}M_{Mg(OH)_2}$

So we use the given data to proof it:

$4.3mL*0.417M=2*11.9mL*0.151M\\1.793=3.594$

Therefore, we can conclude the data is wrong by means of the 2:1 mole ratio that for sure was not taken into account. This is also supported by the fact that normalities are actually the same, but the nomality of magnesium hydroxide is the half of the hydrochloric acid normality since the acid is monoprotic and the base has two hydroxyl ions.

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Balance the following chemical equations:

quester [9]

The first one will be 2 1 -> 2 1
Second is 2 3 -> 6 1

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How is molarity affected if some solution splashes out of the flask during titration?

Annette [7]

<span>If you used more water, the molarity would go down since molarity is moles/liter, and the opposite if you used more water.

If the acid absorbed water, the molarity would go down because the absorbed moisture will skew the weight of the acid up.

That would make the molarity go down since there would have been unreacted acid in the spilled liquid.</span>

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