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If a 500 mL IV contains 30 mEq of KCl and runs at 50 mL/hour, how many mEq of KCl have been received after 2 hours?

A. 5 mEq
B. 6 mEq
C. 10 mEq
D. 15 mEq

Answer :

The meq of KCl have been received after 2 hours if a 500 ml iv contains 30 meq of kcl and runs at 50 ml/hours is 6 meq (Option B).

Each hour, 15 meq of KCl are infused (30 meq divided by 2 hours). At a rate of 50 ml per hour, after 2 hours, a total of 100 ml of fluid would have been infused. Therefore, after 2 hours, the patient would have received 30 meq of KCl (15 meq per hour x 2 hours) in 100 ml of fluid, which is equal to 0.3 meq/ml. Thus, the patient would have received 6 meq of KCl after 2 hours (0.3 meq/ml x 20 ml).

Therefore, the answer is 6 meq.

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