All categories

3 years ago

During a lab experiment performed at STP conditions, you prepare HCl by reacting 100. ml of Cl2 gas with an excess of H2 gas.

Chemistry

1 answer:

Brrunno [24]3 years ago

3 0

Answer: 19.4 mL Ba(OH)2

Explanation:

H2(g) + Cl2(g) --> 2HCl(aq) (make sure this equation is balanced first)

At STP, 1 mol gas = 22.4 L gas. Use this conversion factor to convert the 100. mL of Cl2 to moles.

0.100 L Cl2 • (1 mol / 22.4 L) = 0.00446 mol Cl2

Use the mole ratio of 2 mol HCl for every 1 mol Cl2 to find moles of HCl produced.

0.00446 mol Cl2 • (2 mol HCl / 1 mol Cl2) = 0.00892 mol HCl

HCl is a strong acid and Ba(OH)2 is a strong base so both will completely ionize to release H+ and OH- respectively. You need 0.00892 mol OH- to neutralize all of the HCl. Note that one mole of Ba(OH)2 contains 2 moles of OH-.

0.00892 mol OH- • (1 mol Ba(OH)2 / 2 mol OH-) • (1 L Ba(OH)2 / 0.230 M Ba(OH)2) = 0.0194 L = 19.4 mL Ba(OH)2

You might be interested in

How many grams of Cu(OH)2 will precipitate when excess NaOH solution is added to 46.0 mL of 0.584 M CuSO4

Slav-nsk [51]

<h3>Answer:</h3>

2.624 g

<h3>Explanation:</h3>

The equation for the reaction is given as;

CuSO₄(aq) + 2NaOH(aq) → Cu(OH)₂(s) + Na₂SO₄(aq)
Volume of CuSO₄ as 46.0 mL;
Molarity of CuSO₄ as 0.584 M

We are required to calculate the mass of Cu(OH)₂ precipitated

We are going to use the following steps;

<h3>Step 1: Calculate the number of moles of CuSO₄ used</h3>

Molarity = Number of moles ÷ Volume

To get the number of moles;

Moles = Molarity × volume

= 0.584 M × 0.046 L

= 0.0269 moles

<h3>Step 2: Calculate the number of moles of Cu(OH)₂ produced </h3>

From the equation 1 mole of CuSO₄ reacts to give out 1 mole of Cu(OH)₂
Therefore; Mole ratio of CuSO₄ to Cu(OH)₂ is 1 : 1.

Thus, Moles of CuSO₄ = Moles of Cu(OH)₂

Hence, moles of Cu(OH)₂ = 0.0269 moles

<h3>Step 3: Calculate the mass of Cu(OH)₂</h3>

To get mass we multiply the number of moles with the molar mass.

Mass = Moles × Molar mass

Molar mass of Cu(OH)₂ is 97.561 g/mol

Therefore;

Mass of Cu(OH)₂ = 0.0269 moles × 97.561 g/mol

= 2.624 g

Thus, the mass of Cu(OH)₂ that will precipitate is 2.624 g

3 0

3 years ago

What is the formula of manganese (Il)<br> phosphate? chemistry related

xeze [42]

The chemical formula of manganese (Il) phosphate is Mn3(PO4)2, which is option 2.

<h3>What is chemical formula?</h3>

The chemical formula of a compound is the notation indicating the number of atoms of each element present in a compound.

The chemical formula of a compound tells us the type of elements in the compound, the number atoms of each element in the compound and in what proportion these elements are present.

According to this question, manganese II phosphate has the chemical formula of Mn3(PO4)2.

This chemical formula shows that it posseses the following:

3 manganese atoms
2 phosphorus atoms
8 oxygen atoms

Learn more about chemical formula at: brainly.com/question/11995171

#SPJ1

4 0

2 years ago

Which events occurred during the space race

Roman55 [17]

Answer:

Date Significance Soviet Union Mission

August 21, 1957 First intercontinental ballistic missile (ICBM) R-7 Semyorka

October 4, 1957 First artificial satellite First signals from space Sputnik 1

November 3, 1957 First dog in orbit (Laika) Sputnik 2

January 31, 1958 First US satellite, detection of Van Allen radiation belts

Explanation:

8 0

3 years ago

Read 2 more answers

Atoms of a substance are rearranged _______.

Yanka [14]

Atoms are never rearranged

6 0

3 years ago

A reaction that combines simpler reactants to form a new compound is called a

uranmaximum [27]

Answer:

A reaction that combines simpler reactants to form a new compound is called a

<h2>Synthesis reaction.</h2>

6 0

4 years ago