Pentothal is a barbiturate used (as its sodium salt) as a short-acting anesthetic. Pentothal is a weak acid with a dissociation constant K_a = 4 × 10⁻⁸ M. Which one of the statements best describes the dissociation state of pentothal in the blood, which has a pH of 7.4?

Question

Pentothal is a barbiturate used (as its sodium salt) as a short-acting anesthetic. Pentothal is a weak acid with a dissociation constant K<sub>a</sub> = 4 × 10<sup>−8</sup> M. Which one of the statements best describes the dissociation state of pentothal in the blood, which has a pH of 7.4? A) more than 90% dissociated B) between 60% and 90% dissociated C) about half dissociated D) between 10% and 40% dissociated E) less than 10% dissociated

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The Answer of Pentothal is a barbiturate used (as its sodium salt) as a short-acting anesthetic. Pentothal is a weak acid with a dissociation constant K_a = 4 × 10⁻⁸ M. Which one of the statements best describes the dissociation state of pentothal in the blood, which has a pH of 7.4?

Pentothal Is a Barbiturate Used (As Its Sodium Salt) as a Short-Acting