Problem: One mole of a weak acid HA was dissolved in 2.0 L of solution. After the system had come to equilibrium, the concentration of HA was found to be 0.45 M. Calculate Ka for HA.

FREE Expert Solution

To calculate Ka for HA


Ka expression 


Ka=productsreactants=[H3O+][A-][HA]


Step 1: [HA]initial (molarity)


Molarity, [HA]=moles HAL solution[HA]=1.0 mol HA2.0 L

[HA]initial = 0.5 M 


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Problem Details

One mole of a weak acid HA was dissolved in 2.0 L of solution. After the system had come to equilibrium, the concentration of HA was found to be 0.45 M. Calculate Ka for HA.

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