Phosphporic acid is why called strong acid
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you can call it "weak acid".
value of Ka indicates the strength of the acids.
you can get a brief idea:
Ka for HCl : 10^7
Ka for H2SO4 : 10^2
Ka for CH3COOH: 1.8 * 10^-5
Ka for H3PO4 : 7.5 * 10^-3
H3PO4 is placed very close to CH3COOH which itself is a weak acid.
value of Ka indicates the strength of the acids.
you can get a brief idea:
Ka for HCl : 10^7
Ka for H2SO4 : 10^2
Ka for CH3COOH: 1.8 * 10^-5
Ka for H3PO4 : 7.5 * 10^-3
H3PO4 is placed very close to CH3COOH which itself is a weak acid.
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