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Ludmilka [50]
3 years ago
15

What is the concentration of an unknown Mg(OH)2 solution if it took an average of 15.4mL of

Chemistry
1 answer:
vova2212 [387]3 years ago
7 0

Answer:

0.077M

Explanation:

Step 1:

The balanced equation for the reaction. This is given below:

2HCl + Mg(OH)2 —> MgCl2 + 2H2O

From the balanced equation above,

The mole ratio of the acid (nA) = 2

The mole ratio of the base (nB) = 1

Step 2:

Data obtained from the question.

Concentration of base Cb =...?

Volume of base (Vb) = 10mL

Concentration of acid (Ca) = 0.1M

Volume of acid (Va) = 15.4mL

Step 3:

Determination of the concentration of the base, Mg(OH)2.

The concentration of the base can be obtained as follow:

CaVa/CbVb = nA/nB

0.1 x 15.4 /Cb x 10 = 2/1

Cross multiply to express in linear form

Cb x 10 x 2 = 0.1 x 15.4

Divide both side by 10 x 2

Cb = (0.1 x 15.4) /(10 x 2)

Cb = 0.077M

Therefore, the concentration of the base, Mg(OH)2 is 0.077M

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How many molecules of NaCl are there in 250 grams of table salt
devlian [24]

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4.27 moles of NaCl

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3 years ago
Which of the following about a balanced chemical reactions is
gavmur [86]

Answer:

A balanced chemical equation must always include coefficients on every reactant and product.

Explanation:

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6 0
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How many liters will 2.76 mol CO2 occupy?<br> 2.76 mol<br> II
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<h3>Avogadro's law:</h3><h3 />

In chemistry, gas laws are used to relate the behavior of gases by virtue of the their pressure, volume, temperature and moles; thus several gas laws exist for us to do so, however, we here focus on the Avogadro's law which relates the volume and moles when both temperature and pressure are held constant.

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