Question

The pH of a substance is measured. Which value would identify the substance as a strong base?(1 point) Responses 2.5 2.5 8.3 8.3 11.0 11.0 7.0

Answer 1

[AI-generated answer — Bot GPT 3.5]

The value 11.0 would identify the substance as a strong base.

Answer 2

Which statement correctly explains why H2S is a stronger acid than water?(1 point) Responses Sulfur (S) has a larger atomic size than oxygen (O), so H2S is a more stable, stronger acid than H2O. Sulfur (S) has a larger atomic size than oxygen (O), so H 2 S is a more stable, stronger acid than H 2 O. Sulfur (S) has a larger atomic size than oxygen (O), so HS– is a more stable, weaker base than OH–. Sulfur (S) has a larger atomic size than oxygen (O), so HS – is a more stable, weaker base than OH – . Sulfur (S) has a larger atomic size than oxygen (O), so HS– is a more stable, stronger acid than OH–. Sulfur (S) has a larger atomic size than oxygen (O), so HS – is a more stable, stronger acid than OH – . Sulfur (S) has a larger atomic size than oxygen (O), so H2S is a more stable, weaker base than H2O.

Answer 3

[AI-generated answer — Bot GPT 3.5]

Sulfur (S) has a larger atomic size than oxygen (O), so H2S is a more stable, stronger acid than H2O.

Answer 4

What is the pH of a 1×10−41×10−4 mol HCl solution?(1 point) Responses 6 6 2 2 4 4 8

Answer 5

[AI-generated answer — Bot GPT 3.5]

The pH of a 1×10^(-4) mol HCl solution can be calculated using the formula: pH = -log[H+].

Since HCl is a strong acid, it completely ionizes in water, producing H+ ions.
Therefore, the concentration of H+ ions in the solution is 1×10^(-4) mol.

Taking the negative logarithm of this concentration:

pH = -log(1×10^(-4)) = 4.

So, the pH of the solution is 4.

Answer 6

Use the paragraph to complete the activity. Divers who go to great depths in the ocean experience large differences in pressure between the surface and their final destinations below the surface. At times, they have to avoid quick changes in pressure because of the effects on the solubility of nitrogen in their blood. If the solubility decreases quickly, then gas bubbles can form in the person’s blood, causing a dangerous condition called “the bends.” In one or two sentences, state whether you would expect the condition to be a greater hazard for divers as they dive down or as they return to the surface. Then, explain your prediction in terms of the solubility of gases in liquids at different pressures. use tenth grader vocabulary

Answer 7

[AI-generated answer — Bot GPT 3.5]

The condition of "the bends" would be a greater hazard for divers as they return to the surface. This is because as the pressure decreases during ascent, the solubility of gases in the blood decreases as well, leading to the formation of gas bubbles and potentially causing the dangerous condition.

Answer 8

In one to two sentences, describe the process by which the ionic compound, LiCl, would dissolve in the polar solvent, CH3COCH3.(2 points). use tenth grader vocabulary

Answer 9

[AI-generated answer — Bot GPT 3.5]

In the process of dissolution, the polar solvent CH3COCH3 surrounds and separates the LiCl molecules, pulling them apart from each other due to its ability to attract opposite charges, resulting in the formation of Li+ and Cl- ions that are dispersed throughout the solution.

Answer 10

Hydrogen selenide (H2Se) reacts with water according to the following equation. H2Se + H2O → SeH– + H3O+ In three to five sentences, identify the acid, base, conjugate acid, and conjugate base in this reaction. Use patterns in the periodic table to explain why the substances you identified acted as the acid and the base in this reaction. use tenth grader vocabulary

Answer 11

[AI-generated answer — Bot GPT 3.5]

In this reaction, H2Se acts as the acid and H2O acts as the base. H2Se donates a proton (H+) to H2O, making it the acid. H2O accepts the proton, forming H3O+, which is the conjugate acid. SeH- is the conjugate base, as it is formed when H2Se loses a proton.

H2Se acts as the acid because it has a higher electronegativity and is more likely to donate a proton. Water (H2O) acts as the base because it has a lone pair of electrons that can accept a proton. The trend in the periodic table shows that as we move down a group, the acidity of hydrides increases. Since selenium (Se) is below oxygen (O) in the same group, it has a larger atomic radius and weaker electronegativity, making H2Se more acidic than H2O.

Answer 12

say all of that in teneth grader vocabulary words

Answer 13

[AI-generated answer — Bot GPT 3.5]

In this reaction, H2Se is the acid and H2O is the base. H2Se gives away a proton (H+), making it the acid. H2O accepts the proton, leading to the formation of H3O+, which is called the conjugate acid. SeH- is the conjugate base in this reaction because it is formed when H2Se loses a proton.

H2Se is the acid because it has a higher tendency to lose a proton, and H2O acts as the base because it has the ability to accept a proton. The periodic table pattern shows that as we go down a group, the acidity of hydrides increases. Since selenium (Se) is located below oxygen (O) in the periodic table, it has a larger size and weaker attraction for electrons, making H2Se more acidic than H2O.

Answer 14

Use the "My solution mode" simulation to complete the activity. Acid-Base Solutions Describe how you could adjust the settings of the simulation to increase the number of red (H3O+) and blue (A-) particles in the solution of equilibrium. In three to four sentences, justify your answer and explain how and why this would change the pH of the solution. (4 points). use tenth grader vocabulary words in your answer

Answer 15

[AI-generated answer — Bot GPT 3.5]

To increase the number of red (H3O+) and blue (A-) particles in the solution of equilibrium in the Acid-Base Solutions simulation, you can increase the concentration of the acid or base by adjusting the slider to the right. This would result in more acid/base particles dissociating, leading to an increase in the concentrations of H3O+ and A- ions.

Increasing the concentration of H3O+ ions would lower the pH of the solution as more H3O+ ions would be present, making it more acidic. On the other hand, increasing the concentration of A- ions (conjugate base) would have an opposite effect. It would result in the formation of more base particles, leading to a decrease in H3O+ concentration and an increase in OH- concentration, making the solution more basic (higher pH).