Chemistry question - please help

25 cm3 of a solution of an acid HxA containing 0.1 M of the acid in each 1000 cm3 of solution reacts with 75 cm3 of a solution of 0.1M NaOH. What is the value of x?

Reply 1

mubinchoudhury

Widowmaker

25 cm3 of a solution of an acid HxA containing 0.1 M of the acid in each 1000 cm3 of solution reacts with 75 cm3 of a solution of 0.1M NaOH. What is the value of x?

75cm3 is 0.075dm3 of NaOH. From the formula:

M=CV

you should know that 0.1*0.075 = 0.0075moles of NaOH has reacted.

From the same formual you should know that 0.1*0.025 = 0.0025 moles of acid have reacted. The ratio is therefore:

0.0025:0.0075 = 1:3

Of acid to NaOH. Hence for every OH- groups, 3H+ reacted.

x=3

Reply 2

Expression

Widowmaker

25 cm3 of a solution of an acid HxA containing 0.1 M of the acid in each 1000 cm3 of solution reacts with 75 cm3 of a solution of 0.1M NaOH. What is the value of x?

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Reply 3

Christophicus