## Aliquot Calculation Quiz

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- Question 1 of 10
##### 1. Question

2 pointsA pharmacist is asked to weigh 140 mg of lidocaine powder on the standard balance. The maximum percent error by law is 5% and the balance states the sensitivity requirement is 3 mg. What is the minimum weighable quantity? Do not include units.

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##### 2. Question

2 pointsWhat is the smallest quantity that can be weighed on a scale that has a sensitivity requirement of 5 mg and an acceptable error of 7%? Round to the nearest tenth. Do not include units.

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##### 3. Question

2 pointsExplain how you would use the aliquot method of weighing to obtain 15 mg of codeine sulfate if you have a standard pharmacy balance. Use lactose as an inert diluent.

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##### 4. Question

2 pointsYou are reviewing a prescription that asked to weigh 5 mg of hydromorphone hydrochloride. The final mixture was 4500 mg containing 150mg of hydromorphone hydrochloride and 4350 mg of lactose. What is the maximum percent error of weighing assuming 120 mg as the minimum weighable quantity (MWQ) and a sensitivity requirement (SR) of 3 mg. Round to the nearest tenth. Do not include percent sign.

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##### 5. Question

2 pointsA prescription balance has a sensitivity requirement of 8 milligrams. The prescription asks you to weigh 10 mg of morphine sulfate with an error not greater than 5%. How would you weigh this amount using lactose as your diluent?

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##### 6. Question

2 pointsA prescription asks you to measure a volume of 0.75 mL of a 10mg/mL solution and the smallest graduated cylinder you have is 10 ml. Using water as diluent, how would you prepare this volume.

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##### 7. Question

2 pointsA formula calls for 0.8 milliliter of a coloring solution. Using a 10-mL graduate calibrated from 2 to 10 milliliter units in 1-milliliter units, how could you obtain the desired quantity of the coloring solution by the aliquot method? Use water as diluent.

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##### 8. Question

2 pointsHow much drug and diluent do you need to measure 12 mg of the drug on a scale that has a sensitivity requirement of 6 mg and an acceptable error of 6%?

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##### 9. Question

2 pointsA pharmacist is asked to weigh 50 mg of oxymorphone on a prescription balance having a sensitivity requirement of 6 mg. How would you weigh this amount with an acceptable error in weighing of 5% using lactose as the diluent?

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##### 10. Question

2 pointsExplain how you would weigh 5 mg of sodium phenobarbital if you have a standard pharmacy balance using lactose as your diluent.

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