A Student Determined the Equilibrium Concentration in the Following Equation

question 16

Multiple Choice

A student determined the equilibrium concentration in the following equation by neglecting the x term in the denominator. Was she justified or not in this approximation and why? K  4.0  10^2 

• A)Yes, the concentration is much greater than K, so the x can be ignored.
• B)Yes, the value of x determined in this way is less than 0.05, so it can be ignored.
• C)No, the value of x determined in this way significantly reduces the denominator.
• D)No, the value of x can never be ignored in solving an algebra problem.
• E)No, the value of K is much less than 1, so x cannot be ignored.

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