Answer is: concentration ammonia is higher than concentration of ammonium ion.
Chemical reaction of ammonia in water: NH₃ + H₂O → NH₄⁺ + OH⁻.
Kb(NH₃) = 1,8·10⁻⁵.
c₀(NH₃) = 0,8 mol/L.
c(NH₄⁺) = c(OH⁻) = x.
c(NH₃) = 0,8 mol/L - x.
Kb = c(NH₄⁺) · c(OH⁻) / c(NH₃).
0,000018 = x² / 0,8 mol/L - x.
solve quadratic equation: x = c(NH₄⁺) = 3,79·10⁻³ mol/L.
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Answer:
12.5 moles H2SO4
Explanation:
Calculate the amount, in moles, of 2.5 L of a 5.0 M sulfuric acid, H2SO4.
5.0 M means 5 moles per liter.
so in 2.5 L we have
5.0 X 2.25 = 12.5 moles H2SO4
