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What are the equilibrium concentrations of hydronium ion acetate ion and acetic acid in a 0.10 m aqueous solution of acetic acid?
[H+] = = SQRT(Ka*ca) = SQRT(1.7*10-5 * 0.10) = 1.3*10-3 mol/L, (thus pH = 2.9)and[CH3COOH] = ca - [CH3COO-] = 0.10 - 1.3*10-3 = 0.0987 = 0.10 mol/L,all concentrations are at 25oC in water.
The acid base indicator bromcresol green is weak acid. The yellow acid and blue base forms of the indicator are present in equal concentrations in a sloution when the pH 4.68. What is b.g. pKa?
By definition, the pKa of a weak acid is the pH at which the concentrations of the acid and its conjugate base are equal. In this case, since the solution is yellow (acid) and blue (base) at pH 4.68, it means that the concentration of the acid and base forms of the indicator are equal. Therefore, the pKa of bromcresol green is 4.68.
Why does pH scale generally range from 0 to 14 in aqueous solutions?
The pH scale ranges from 0 to 14 in aqueous solutions because it corresponds to the concentration of hydrogen ions (H+) in the solution. A pH of 7 is considered neutral, with equal concentrations of H+ and OH- ions. Values below 7 indicate an acidic solution with higher H+ concentrations, while values above 7 indicate a basic solution with lower H+ concentrations.
Is it true that solutions that have an equal concentration of H plus ions and OH- are considered acidic?
False - such a solution is considered "neutral"...neither acidic nor alkaline (basic).
What is a following characterizes a reaction at equilibrium?
At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction. The concentrations of reactants and products remain constant over time. The equilibrium constant, which is the ratio of product concentrations to reactant concentrations, is constant at a given temperature.
What are solutions with equal concentrations of solutes?
isotonic
What is it called when concentrations of two solutions are equal?
When the concentrations of two solutions are equal, it is referred to as "isotonic." In an isotonic solution, the osmotic pressure is the same on both sides of a membrane, which means there is no net movement of water across the membrane. This concept is essential in biology, particularly in understanding cell behavior in different environments.
How are the concentrations of hydronium ions and hydroxide ions in aqueous solutions related?
The pH of a solution is related directly to its concentrations of hydronium ions(H3O^+) and hydroxide ions(OH-). Acidic solutions have more hydronium ions than hydroxide ions. Neutral solutions have equal numbers of the 2 ions. Basic solutions have more hydroxide ions than hydronium ions.
What are the equilibrium concentrations of hydronium ion acetate ion and acetic acid in a 0.10 m aqueous solution of acetic acid?
[H+] = = SQRT(Ka*ca) = SQRT(1.7*10-5 * 0.10) = 1.3*10-3 mol/L, (thus pH = 2.9)and[CH3COOH] = ca - [CH3COO-] = 0.10 - 1.3*10-3 = 0.0987 = 0.10 mol/L,all concentrations are at 25oC in water.
What are the hydrogen ion and hydrogen ion concentrations in water?
These concentrations are supposed to be equal.
When does the concentration gradient between two solutions disappear?
The concentration gradient between two solutions disappears when the concentrations of solute in both solutions become equal, achieving a state of equilibrium. At this point, there is no net movement of solute particles from one solution to the other, as the rates of diffusion in both directions are equal. This can occur through processes such as diffusion or osmosis, depending on the specific conditions and the permeability of any barriers separating the solutions.
The acid base indicator bromcresol green is weak acid. The yellow acid and blue base forms of the indicator are present in equal concentrations in a sloution when the pH 4.68. What is b.g. pKa?
By definition, the pKa of a weak acid is the pH at which the concentrations of the acid and its conjugate base are equal. In this case, since the solution is yellow (acid) and blue (base) at pH 4.68, it means that the concentration of the acid and base forms of the indicator are equal. Therefore, the pKa of bromcresol green is 4.68.
What is osmosis controlled by?
Osmosis is controlled by the permeability of the osmotic membrane and the equilibrium of the solutions on either side of the membrane. If the solutions have unequal concentrations or osmotic pressures, and the molecules in the solution can pass through the membrane, then the solutions will mix until both sides have equal concentrations. If the membrane is impermeable, then nothing will happen.
What will happen to two solutions in equilibrium?
In a dynamic equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, causing no overall change in the concentrations of the reactants and products. This results in a stable state where both solutions coexist without any noticeable changes over time.
What has greater osmotic power at equal concentrations?
electrolytes
Why does the level of a more concentrated solution rise when two solutions of different concentrations are separated by a semipermeable membrane and when does it stop rising?
The more concentrated solution is hypertonic and osmotic pressure (a hydrostatic force whose sole purpose in life is to make concentrations equal) tends to move solvent into the more concentrated solution. It will stop rising when either a) the solution concentrations are the same on both sides of the membrane, or b) when the osmotic pressure becomes equal to the ambient air pressure.
Why does pH scale generally range from 0 to 14 in aqueous solutions?
The pH scale ranges from 0 to 14 in aqueous solutions because it corresponds to the concentration of hydrogen ions (H+) in the solution. A pH of 7 is considered neutral, with equal concentrations of H+ and OH- ions. Values below 7 indicate an acidic solution with higher H+ concentrations, while values above 7 indicate a basic solution with lower H+ concentrations.
