Assume that acid rain has lowered the ph of a particular lake to ph 5.0. what is the hydroxide ion concentration of this lake?
1 answer:
That acid rain has lowered the ph of a particular lake to ph 5.0. the hydroxide ion concentration of this lake is
1 × 10^-9 mol of hydroxide ions per liter of lake water
pH + pOH = 14
pOH = 14 - 5
pOH = 9.00
pOH = -log [OH⁻]
[OH⁻] = 10^-pOH
[OH⁻] = mol
Therefore,
the hydroxide ion concentration of this lake is 1 × 10^-9 mol
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The empirical formula for a compound that contains 48.6%C, 8.2% H, and 43.2% S by mass is .
An empirical formula tells us the relative ratios of different atoms in a compound.
We need to calculate the number of moles
Number of a mole of carbon =
48.6 g X () =4.05 mole
Number of a mole of hydrogen =
8.2g X () =8.14 mole
Number of moles of sulphur =
43.2g X () = 1.35 mole
Dividing each mole using the smallest number that is divided by 1.35 moles.
Carbon= =3
Oxygen= =6
Sulfur= =1
Empirical formula is
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