Question

question 1 (2.5 points)
what is the strength of a solution if 1 fl oz of hydrogen peroxide is mixed with 3 fl oz of normal saline?
○ ¼ strength
○ 1/3 strength
○ ½ strength
○ 2/3 strength

question 2 (2.5 points)
a vial of ancef 1 g is reconstituted with 5 ml of normal saline to yield 125 mg/ml.
how many ml of the medication should be given if a patient is prescribed 250 mg of the medication?
○ 1.0 ml
○ 1.25 ml
○ 1.5 ml
○ 2.0 ml

question 3 (2.5 points)
what solution is created if 180 ml of hydrogen peroxide is mixed with 60 ml of normal saline?
○ 240 ml ¼ strength
○ 240 ml 1/3 strength

Explanation:

Question 1

Step1: Find total volume

Total volume = 1 + 3 = 4 fl oz

Step2: Calculate strength

Strength = $\frac{\text{Volume of hydrogen peroxide}}{\text{Total volume}}$ = $\frac{1}{4}$

Step1: Identify concentration and dose

Concentration = 125 mg/mL, Prescribed dose = 250 mg

Step2: Use formula Volume = $\frac{\text{Dose}}{\text{Concentration}}$

Volume = $\frac{250}{125}$ = 2.0 mL

Step1: Find total volume

Total volume = 180 + 60 = 240 mL

Step2: Calculate strength

Strength = $\frac{\text{Volume of hydrogen peroxide}}{\text{Total volume}}$ = $\frac{180}{240}$ = $\frac{3}{4}$? Wait, no, wait. Wait, if hydrogen peroxide is 180 mL and saline 60 mL, total 240 mL. Wait, maybe I misread. Wait, maybe the question is about the strength of hydrogen peroxide. Wait, strength is (volume of solute)/(total volume). So 180 mL hydrogen peroxide, total 240 mL. So 180/240 = 3/4? But the options given have ¼ and 1/3. Wait, maybe I reversed. Wait, maybe the solute is saline? No, hydrogen peroxide is the solute. Wait, maybe the question was 60 mL hydrogen peroxide and 180 mL saline? Wait, the user's question 3: "What solution is created if 180 mL of hydrogen peroxide is mixed with 60 mL of normal saline?" Wait, total volume 240 mL. So strength of hydrogen peroxide is 180/240 = 3/4, but the options are 240 mL ¼ strength or 240 mL 1/3 strength. Wait, maybe I made a mistake. Wait, maybe the solute is saline? No, hydrogen peroxide is the active. Wait, maybe the question is about the strength of the solution (hydrogen peroxide in saline). Wait, 180 mL H₂O₂ and 60 mL saline. So H₂O₂ is 180, total 240. 180/240 = 3/4. But the options have ¼ and 1/3. Wait, maybe the numbers are reversed? If it was 60 mL H₂O₂ and 180 mL saline, total 240, then 60/240 = 1/4. But the question says 180 mL H₂O₂. Wait, maybe the options are different. Wait, assuming the options are about the strength of the hydrogen peroxide solution, and maybe the user's options were cut off, but based on calculation, total volume is 240 mL, and strength is 180/240 = 3/4, but since the options given have ¼ and 1/3, maybe there's a typo. But if we proceed with the given numbers:

Wait, maybe the question is about the strength of the solution (the concentration of hydrogen peroxide). So 180 mL H₂O₂ in 240 mL total. So 180/240 = 3/4. But the options have ¼ and 1/3. Wait, maybe I misread. Wait, maybe the hydrogen peroxide is 60 mL and saline 180 mL? Let's check: 60 + 180 = 240 mL. Then strength is 60/240 = 1/4. So maybe a typo in the question. Assuming that, then:

Answer:

¼ strength

Question 2