Determine the concentration of
Sulfuric acid ( ) is a strong acid and disassociates completely in water to form hydrogen and sulfate ions. The disassociation of sulfuric acid in water is shown below:
->
+
Since 1 mole of disassociates into 2 moles of
, the concentration of hydrogen ions (
) is equal to twice the concentration of
:
2 x (2.1 x ) = 0.00042M
Choose a formula
We can use the following formula to calculate the [ ]:
[ ][
] = 1.0 x
M
1.0 x is the ionization constant for water (
)
Rearrange the formula to isolate [ ] by dividing both sides by [
]:
[ ] = 1.0 x
/[
]
Solve for [ ] using [
]
[ ] = 1.0 x
/0.00042
= 2.4 x M
Therefore, the answer is c.
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