K a of weak acid has to be calculated when 0 .035 M acid solution of has pH 4 .88 . Concept Introduction: An equilibrium constant ( K ) is the ratio of concentration of products and reactants raised to appropriate stoichiometric coefficient at equlibrium. For the general acid HA, HA ( aq ) + H 2 O ( l ) ⇌ H 3 O + ( aq ) + A − ( aq ) The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows: K a = [ H 3 O + ] [ A − ] [ HA ] ( 1 ) An equilibrium constant ( K ) with subscript a indicate that it is an equilibrium constant of an acid in water. The formula is given below for calculating concentration of H 3 O + , [H 3 O + ] = 10 -pH
K a of weak acid has to be calculated when 0 .035 M acid solution of has pH 4 .88 . Concept Introduction: An equilibrium constant ( K ) is the ratio of concentration of products and reactants raised to appropriate stoichiometric coefficient at equlibrium. For the general acid HA, HA ( aq ) + H 2 O ( l ) ⇌ H 3 O + ( aq ) + A − ( aq ) The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows: K a = [ H 3 O + ] [ A − ] [ HA ] ( 1 ) An equilibrium constant ( K ) with subscript a indicate that it is an equilibrium constant of an acid in water. The formula is given below for calculating concentration of H 3 O + , [H 3 O + ] = 10 -pH
Definition Definition Number that is expressed before molecules, ions, and atoms such that it balances out the number of components present on either section of the equation in a chemical reaction. Stoichiometric coefficients can be a fraction or a whole number and are useful in determining the mole ratio among the reactants and products. In any equalized chemical equation, the number of components on either side of the equation will be the same.
Chapter 18, Problem 18.65P
Interpretation Introduction
Interpretation:
Ka of weak acid has to be calculated when 0.035 Macid solution of has pH 4.88.
Concept Introduction:
An equilibrium constant(K) is the ratio of concentration of products and reactants raised to appropriate stoichiometric coefficient at equlibrium.
For the general acid HA,
HA(aq)+H2O(l)⇌H3O+(aq)+A−(aq)
The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows:
Ka=[H3O+][A−][HA](1)
An equilibrium constant (K) with subscript a indicate that it is an equilibrium constant of an acid in water.
The formula is given below for calculating concentration of H3O+,
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