# What is Ka KB kw?

## What is Ka KB kw?

To summarize: Ka * Kb is equivalent to adding the acid and base reactions together, which results in a net equation of the autoionization of water. It’s not a neutralization/acid-base reaction, but I think the Kw = Ka * Kb is a mathematical relation made to expedite calculations.

## Does Ka have to be positive?

pKa=-log10(Ka). The log10 of a number greater than 1 is positive. log10 of a number less than 1 is negative. Since you already have a minus sign in your formula for pKa, strong acids with a Ka (much) greater than one will have a negative pKa and weak acids for which the Ka is less than one will have a positive pKa.

## What is Ka equation?

General base dissociation in water is represented by the equation B + H2O –> BH+ + OH-. Ka and Kb values measure how well an acid or base dissociates. Higher values of Ka or Kb mean higher strength. General Ka expressions take the form Ka = [H3O+][A-] / [HA].

## What is the Ka of water?

Ka = [H+][OH-]/[H2O] Since [H2O] is a constant of 55 mol dm^-3, and [H+][OH-] is equivalent to Kw, which is 10^-14, then Ka = 1.8×10^-16 mol dm^-3 at 25 degrees celcius.

## What is the Ka of h2co3?

It should be noted that carbonic acid is a weak acid, so its Ka value in water is only 4.3 x 10^-7.

## Is h2co3 a gas?

Carbonic acid is a carbon-containing compound which has the chemical formula H2CO3. Solutions of carbon dioxide in water contain small amounts of this compound. Carbonic acid is often described as a respiratory acid since it is the only acid that is exhaled in the gaseous state by the human lungs.

Nitric Acid

## How can you tell a strong acid?

Any acid that dissociates 100% into ions is called a strong acid. If it does not dissociate 100%, it is a weak acid.

## What are the strongest bases?

Strong Arrhenius Bases

• Sodium hydroxide (NaOH)
• Barium hydroxide (Ba(OH)2)
• Caesium hydroxide (CsOH)
• Sodium hydroxide (NaOH)
• Strontium hydroxide (Sr(OH)2)
• Calcium hydroxide (Ca(OH)2)
• Lithium hydroxide (LiOH)
• Rubidium hydroxide (RbOH)

## What is a weak acid Example?

Examples of weak acids include acetic acid (CH3COOH), which is found in vinegar, and oxalic acid (H2C2O4), which is found in some vegetables. VinegarsAll vinegars contain acetic acid, a common weak acid.