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kykrilka [37]
3 years ago
15

Identify the base in this acid-base reaction:

Chemistry
1 answer:
NARA [144]3 years ago
7 0

Answer: Magnesium hydroxide, Mg(OH)2

Explanation:

2HC2H3O2(aq) + Mg(OH)2(aq) → Mg(C2H2O2)2(aq) + 2H2O(l)

Acid + base → Salt + Water.

The equation above is an example of an acid-base reaction where the acid, aqeous 2HC2H3O2 reacts completely with an appropriate amount of the base, aqueous Mg(OH)2 to produce salt, aqueous Mg(C2H2O2)2 and water, liquid H2O only.

This acid-base reaction is also known as neutralization reaction.

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4. In the chemical equation H202(aq) → H2O(l) + O2(g), the O2 is a
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The solubility of sugar at 50°C is 260/100g water,and at 0°Cis 180g/100g water. What mass of sugar,will be deposited if 60g the
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How many grams of zinc metal will react completely with 7.8 liters of 1.6 M HCl? Show all of the work needed to solve this probl
Andru [333]

<u>Answer:</u>

For 1: The correct answer is 407.97 grams.

For 2: The correct answer is 76.72 grams.

<u>Explanation:</u>

  • <u>For 1:</u>

We are given the molarity of HCl, to find the moles of HCl, we use the formula:

Molarity=\frac{\text{Moles}{\text{Volume}}

We are given:

Molarity = 1.6 M

Volume = 7.8 L

Putting values in above equation, we get:

1.6mol/L=\frac{\text{Moles of HCl}}{7.8L}\\\\\text{Moles of HCl}=12.48mol

For the given reaction:

Zn(s)+2HCl(aq.)\rightarrow ZnCl_2(aq.)+H_2(g)

By Stoichiometry of the reaction:

2 moles of HCl reacts with 1 mole of zinc metal.

So, 12.48 moles of HCl react with = \frac{1}{2}\times 12.48=6.24mol of Zinc metal.

To calculate the mass of zinc metal, we use the formula:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}    .....(1)

Molar mass of Zinc metal = 65.38 g/mol

6.24=\frac{\text{Mass of zinc metal}}{65.38g/mol}\\\\\text{Mass of zinc metal}=407.97g

  • <u>For 2:</u>

We are given that 298 grams of 83.1 % by mass of iron (II) nitrate solution are present.

So, mass of Iron (II) nitrate solution will be = \frac{83.1}{100}\times 298=247.638g

Molar mass Iron (II) nitrate = 180 g/mol

Putting values in equation 1, we get:

\text{Moles of }Fe(NO_3)_2=\frac{247.638g}{180g/mol}=1.37mol

For the following reaction:

2Al(s)+3Fe(NO_3)_2(aq.)\rightarrow 3Fe(s)+2Al(NO_3)_3(aq.)

By Stoichiometry of the reaction:

3 moles of Fe(NO_3)_2 produces 3 moles of iron metal.

So, 1.37 moles of Fe(NO_3)_2 will produce = \frac{3}{3}\times 1.37=1.37mol of iron metal.

To calculate the mass of zinc metal, we equation 1:

1.37=\frac{\text{Mass of iron metal}}{56g/mol}\\\\\text{Mass of iron metal}=76.72g

5 0
3 years ago
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