What two regions make up all atoms

Consider the following equilibrium: B(aq)+H2O(l)⇌HB+(aq)+OH−(aq) Suppose that a salt of HB+ is added to a solution of B at equil

Liula [17]

Answer:

Part A: C. The equilibrium constant for the reaction will stay the same.

Part B: A. The concentration of B(aq) will increase.

Part C: C. The pH of the solution will decrease.

Explanation:

Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

Suppose that a salt of HB+ is added to a solution of B at equilibrium.

Part A Will the equilibrium constant for the reaction increase, decrease, or stay the same?

Adding HB+ will increase the concentration of the products side. so, the reaction will be shifted to the lift direction to suppress the effect of adding HB+ and attain the equilibrium again.

so, The equilibrium constant for the reaction will stay the same.

Part B Will the concentration of increase, decrease, or stay the same?

 Adding HB+ will increase the concentration of the products side. so, the reaction will be shifted to the lift direction to suppress the effect of adding HB+ and attain the equilibrium again.

So, the concentration of species in the reactant sides will increase.

Thus, the right choice is:

A. The concentration of B(aq) will increase.

Part C Will the pH of the solution increase, decrease, or stay the same?

 Adding HB+ will increase the concentration of the products side. so, the reaction will be shifted to the lift direction to suppress the effect of adding HB+ and attain the equilibrium again.

So, HB+ reacts with a large amount of OH- to attain the equilibrium again and shifting the reaction towards the lift side to attain the equilibrium again.

Which means decreasing the concentration of OH-.

As the concentration of OH- decreased, the pH of the solution decreased.

So, the right choice is:

c. The pH of the solution will decrease.

6 0

3 years ago

In the background information, it was stated that CaF2 has solubility, at room temperature, of 0.00160 g per 100 g of water. How

____ [38]

Answer:

2.05*10⁻⁵ moles of CF₂ can dissolve in 100 g of water.

12.82 moles of CaF₂ will dissolve in exactly 1.00 L of solution

Explanation:

First, by definition of solubility, in 100 g of water there are 0.0016 g of CaF₂. So, to know how many moles are 0.0016 g, you must know the molar mass of the compound. For that you know:

Ca: 40 g/mole
F: 19 g/mole

So the molar mass of CaF₂ is:

CaF₂= 40 g/mole + 2*19 g/mole= 78 g/mole

Now you can apply the following rule of three: if there are 78 grams of CaF₂ in 1 mole, in 0.0016 grams of the compound how many moles are there?

$moles=\frac{0.0016 grams*1 mole}{78 grams}$

moles=2.05*10⁻⁵

2.05*10⁻⁵ moles of CF₂ can dissolve in 100 g of water.

Now, to answer the following question, you can apply the following rule of three: if by definition of density in 1 mL there is 1 g of CaF₂, in 1000 mL (where 1L = 1000mL) how much mass of the compound is there?

$mass of CaF_{2}=\frac{1000 mL*1g}{1mL}$

mass of CaF₂= 1000 g

Now you can apply the following rule of three: if there are 78 grams of CaF₂ in 1 mole, in 1000 grams of the compound how many moles are there?

$moles=\frac{1000 grams*1 mole}{78 grams}$

moles=12.82

12.82 moles of CaF₂ will dissolve in exactly 1.00 L of solution

5 0

3 years ago

Which two types of clouds indicate fair weather

Bad White [126]

Cirrus and cumulus indicate fair weather

5 0

4 years ago

Read 2 more answers

A drop of vinegar ( a weak acid ) is placed on a sample of each of the materials below. Which will show the most active reaction

professor190 [17]

Answer: Option (B) is the correct answer.

Explanation:

Marble is also known as calcium carbonate and its chemical formula is $CaCO_{3}$ .

When it combines with vinegar then it results in the formation of calcium acetate which is a water soluble compound along with the release of carbon dioxide which occurs in the form of bubbles and water.

The reaction is as follows.

$CaCO_{3} + CH_{3}COOH \rightarrow Ca(CH_{3}COOH)_{2} + H_{2}O + CO_{2}$

Whereas vinegar being a weak acid will not react with glass, copper and steel.

8 0

3 years ago

Read 2 more answers

How many moles of Iron (Fe) can be produced form 20 moles of carbon

Akimi4 [234]

Moles of Fe produced = 40 moles

<h3>Further explanation</h3>

Given

Reaction

2Fe2O3 + 3C —— 4Fe + 3C02

20 moles of C

Required

moles of Fe

Solution

The reaction coefficient in a chemical equation shows the mole ratio of the reacting compounds (reactants and products)

From the reaction, mol ratio of Fe : C = 4 : 3, so mol Fe :

= 4/2 x mol C

= 4/2 x 20

= 40 moles

8 0

3 years ago