NH3(aq)+H2O(l) ⇄ NH+4(aq)+OH−(aq) Kb=1.8×10−5 at 25°C Initial [NH3] Equilibrium [NH+4] Equilibrium [OH−] pOH 0.15 1.6×10−3 1.6×10−3 2.78 0.30 2.3×10−3 ? ? NH3 is a weak base that reacts with water according to the chemical equilibrium represented above. The table provides some information for two NH3(aq) solutions of different concentration at 25°C. Which of the following is true about the more concentrated 0.30M NH3(aq), and why? a ) [OH−]=3.2×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). b) [ OH−]=3.2×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). c) [OH−]=2.3×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). d)[OH−]=2.3×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
NH3(aq)+H2O(l) ⇄ NH+4(aq)+OH−(aq) Kb=1.8×10−5 at 25°C Initial [NH3] Equilibrium [NH+4] Equilibrium [OH−] pOH 0.15 1.6×10−3 1.6×10−3 2.78 0.30 2.3×10−3 ? ? NH3 is a weak base that reacts with water according to the chemical equilibrium represented above. The table provides some information for two NH3(aq) solutions of different concentration at 25°C. Which of the following is true about the more concentrated 0.30M NH3(aq), and why? a ) [OH−]=3.2×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). b) [ OH−]=3.2×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). c) [OH−]=2.3×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). d)[OH−]=2.3×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
NH3(aq)+H2O(l) ⇄ NH+4(aq)+OH−(aq) Kb=1.8×10−5 at 25°C Initial [NH3] Equilibrium [NH+4] Equilibrium [OH−] pOH 0.15 1.6×10−3 1.6×10−3 2.78 0.30 2.3×10−3 ? ? NH3 is a weak base that reacts with water according to the chemical equilibrium represented above. The table provides some information for two NH3(aq) solutions of different concentration at 25°C. Which of the following is true about the more concentrated 0.30M NH3(aq), and why? a ) [OH−]=3.2×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). b) [ OH−]=3.2×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). c) [OH−]=2.3×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq). d)[OH−]=2.3×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
NH3 is a weak base that reacts with water according to the chemical equilibrium represented above. The table provides some information for two NH3(aq) solutions of different concentration at 25°C. Which of the following is true about the more concentrated 0.30M NH3(aq), and why?
a ) [OH−]=3.2×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
b) [ OH−]=3.2×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
c) [OH−]=2.3×10−3 M and pOH < 2.78, because a higher [OH−] corresponds to a lower pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
d)[OH−]=2.3×10−3 M and pOH > 2.78, because a higher [OH−] corresponds to a higher pOH for 0.30M NH3(aq) compared to 0.15M NH3(aq).
Definition Definition State where the components involved in a reversible reaction, namely reactants and product, do not change concentration any further with time. Chemical equilibrium results when the rate of the forward reaction becomes equal to the rate of the reverse reaction.
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