25 cm 3 of sulphuric acid of concentration 0.2 mol dm^ -3 are needed to exactly neutralize 40 cm 3 of sodium hydroxide solution. What is the concentration of the
sodium hydroxide solution in mol dm ^-3 .

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

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Iknow this i just forgot the name