A mixture of benzoic acid and naphthalene was dissolved in tert-butyl methyl ether and the resulting solution was extracted with
1 answer:
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Answer:
Volume : 1.25 L
Explanation:
We are given here that the volume ( V ) = 1.50 Liters, the initial moles ( held at 25 °C ) = 3.00 mol, and the final moles ( n
) = 3.00 - 0.5 = 2.5 mol. The final mol is calculated given that 0.50 mol of gas are released from the prior 3.00 moles of gas.
Volume ( V ) = 1.50 L,
Initial moles ( n ) = 3.00 mol,
Final Volume ( n ) = 3.00 - 0.5 = 2.5 mol
Applying the combined gas law, we can calculate the final volume ( V ).
PV
/ n
T
= P
V
/ n
T
- we know that the pressure and temperature are constant, and therefore we can apply the following formula,
V / n
= V
/ n
- isolate V
,
V = V
n
/ n
= 1.50 L
2.5 mol / 3.00 mol = ( 1.5
2.5 / 3 ) L = 1.25 L
The volume of the balloon will be 1.25 L.
Answer:
Concentration of OH⁻:
1.0 × 10⁻⁹ M.
Explanation:
The following equilibrium goes on in aqueous solutions:
.
The equilibrium constant for this reaction is called the self-ionization constant of water:
.
Note that water isn't part of this constant.
The value of at 25 °C is
. How to memorize this value?
- The pH of pure water at 25 °C is 7.
- However,
for pure water.
- As a result,
at 25 °C.
Back to this question. is given. 25 °C implies that
. As a result,
.