Table of Contents
- 1 How do hydrogen ions affect aqueous solutions?
- 2 What happens when hydrogen ions increase?
- 3 Which change in the H+ ion concentration of an aqueous solution represents a decrease?
- 4 What causes an increase in hydrogen ions?
- 5 What does hydrogen and hydroxide make?
- 6 What process occurs when hydrogen and hydroxide ions are combined in equal concentrations quizlet?
- 7 What happens when hydroxide reacts with hydrogen?
- 8 What happens to pH when the concentration of hydrogen ions decrease?
How do hydrogen ions affect aqueous solutions?
As H+ ions dissociate from the acid and bond with water, they form hydronium ions, thus increasing the hydronium concentration of the solution. If the hydronium concentration decreases, the pH increases, resulting in a solution that is less acidic and more basic.
What happens when hydrogen ions increase?
As the concentration of hydrogen ions in a solution increase, the more acidic the solution becomes. Thus, as the hydrogen ion concentration increases hydroxide ion concentration falls, and vice versa.
What happens when the concentration of hydroxide ions in the solution is increased?
Answer: Concentration of base increases with the increase in OH- ions. An alkali or base is a compound which when dissolved in water yields hydroxyl ions (OH–) as the only negatively charged ion. The Strength of a base depends upon the concentration of hydroxyl ions.
What is the relationship between the concentration of hydrogen ions and hydroxide ions in pure water?
In pure water, the hydrogen ion concentration, [H+], equals the hydroxide ion concentration, [OH-]. These concentrations can be calculated from the equation for the ionization of water. The pH of pure water is 7, the negative logarithm of 1 X 10-7.
Which change in the H+ ion concentration of an aqueous solution represents a decrease?
Highlight to reveal answers and explanations
| Questions | Answer |
|---|---|
| 42 Which change in the H+ ion concentration of an aqueous solution represents a decrease of one unit on the pH scale? (1) a tenfold increase (2) a tenfold decrease (3) a hundredfold increase (4) a hundredfold decrease | 1 |
| 2 |
What causes an increase in hydrogen ions?
Molecules that are dissolved in water may dissociate into charged ions. An acid is a substance that increases the number of H+ ions in a solution. A base is a substance that decreases the number of H+ ions in a solution. The concentration of H+ ions in a solution can be measured and is called the pH of the solution.
How is the concentration of hydrogen and hydroxide ions affected when excess base is dissolved in a solution of sodium hydroxide?
The concentration of hydroxide ions will increase when excess base is dissolved in a solution of sodium hydroxide because the amount of hydroxide ions per unit volume increases.
How is the concentration of hydrogen ions affected when excess base is dissolved in a solution of sodium hydroxide?
When an excess base is dissolved in a solution of sodium hydroxide. Sodium hydroxide dissociates into OH- ions and when the number of OH- increases then concentration also increases because concentration is the number of OH- ions present per unit volume.
What does hydrogen and hydroxide make?
Water. Specifically, water reacting as a base. Oddly enough, water can be considered a molecule (H2O), or an ion group (H+ and OH-). …
What process occurs when hydrogen and hydroxide ions are combined in equal concentrations quizlet?
water produces equal numbers of H+ ions and OH- ions in a process known as self-ionization. water produces equal numbers of H+ ions and OH- ions in a process known as self-ionization. pure water is neutral because equal numbers of H+ ions and OH- ions are always present.
How does the concentration of hydrogen ions change?
Answer: The concentration of hydronium ions decreases when an acid is diluted because on adding water the H+ ions of the acid and hydroxyl ions of water react to form water molecules and the concentration of hydronium ions decreases. When an acid is diluted, then the concentration of hydronium ions decreases.
How does the pH of a solution change when adding hydroxide?
The pH increases. There are two ways to think about this. First, adding hydroxide ions is the same as adding a base, and a base will cause the pH of a solution to become more basic, i.e. increase. Second, hydroxide ions will react with hydrogen ions in the solution to neutralize them, decreasing the concentration of hydrogen ions.
What happens when hydroxide reacts with hydrogen?
Second, hydroxide ions will react with hydrogen ions in the solution to neutralize them, decreasing the concentration of hydrogen ions. Since the pH scale is a negative logarithmic scale, a decrease in the concentration of hydrogen ions means an increase in pH.
What happens to pH when the concentration of hydrogen ions decrease?
Since the pH scale is a negative logarithmic scale, a decrease in the concentration of hydrogen ions means an increase in pH. Q: When hydroxide ions are added to a solution does the pH increase or decrease?
How does dilution affect the basicity of aqueous solutions?
Consider, for example, a NaOH (strong base) aqueous solution: You have a dissociation of Na+ and OH- ions. Of course, the OH- ions give the solution its basicity. By increasing the dilution of the solution, the concentration of dissociated OH- anions decreases, and thus the basicity of the solution decreases.