Questions
Statement 1: The borax is a useful as primary standard for titrating against acids.
Statement 2: Aqueous solution of borax contains equal amounts of weak acid and its salt.
detailed solution
Correct option is A
Na2B4O5 OH4. 8H2O + 2HCl → 2NaCl + 4H3BO3 + 5H2OIndicator methyl orange pH range 3.1−4.4In water, borax gives both BOH3 and BOH4− and only the BOH4− reacts with HIReason : B4O5OH42− + 5H2O ⇌ 3BOH3weak acid + 2 BOH4-its saltthus acts as a buffer.Similar Questions
Borax is used as a cleansing agent because on dissolving in water, it gives:
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