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2 years ago

8. The oxidation number of magnesium in magnesium chloride is _____.

Chemistry

2 answers:

kvasek [131]2 years ago

6 0

Answer: The oxidation number of magnesium in magnesium chloride is +2.

Explanation:

Oxidation number is defined as the number that is assigned to an element when it gains or looses electrons. If an element gains electron, it will attain a negative oxidation number and if an element looses electron, it will attain a positive oxidation number.

The chemical formula for magnesium chloride is $MgCl_2$

We take the oxidation state of magnesium atom be 'x'.

Oxidation state of chlorine atom = -1

Evaluating the oxidation number of magnesium atom:

$x+2(-1)=0\\\\x=+2$

Hence, the oxidation number of magnesium in the given compound is +2.

Gennadij [26K]2 years ago

3 0

-1 or +2 hope that helps!

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If 0.089 grams of KI is dissolved in 500g of H2O, what is the concentration of the resulting solution in parts per million?

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Answer:

The concentration of the resulting solution in parts per million is 177.97

Explanation:

Parts per million (ppm), is a unit of measure for concentration that refers to the number of units of the substance per million units of the set.

The concentration in parts per million expressed in mass / mass is calculated by dividing the mass of the solute (ms) by the mass of the solution (md, sum of the mass of the solute and the mass of the solvent), both expressed in the same unit and multiplied by 10⁶ (1 million).

$ppm=\frac{ms}{md} *10^{6}$

So, being:

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Replacing:

$ppm=\frac{0.089 grams}{500.089 grams}*10^{6}$

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