Question 55

The strength of 1:50 neomycin sulfate solution is 2%.

A 1:50 solution indicates that there is 1 part of neomycin sulfate in 50 total parts of the solution, which translates to a concentration of 2%.

A) 2%

This option is correct because a 1:50 solution indeed corresponds to a concentration of 2%. This is calculated by dividing the amount of solute by the total solution volume, confirming that 2% is the accurate percentage for this dilution.

B) 10%

This option is incorrect because a 10% concentration would imply a much higher amount of neomycin sulfate in relation to the total solution volume. A 1:50 dilution does not reach this concentration, hence it cannot be the correct answer.

C) 20%

This option is also incorrect. A 20% concentration would represent an even larger proportion of neomycin sulfate compared to the total solution, which significantly exceeds what is represented in a 1:50 dilution.

D) 50%

This choice is incorrect as well. A 50% concentration would indicate that there is half of the solution made up of neomycin sulfate, a situation not possible in a 1:50 dilution, where only 2% of the solution is the active ingredient.

Conclusion

The correct answer, 2%, accurately reflects the dilution represented by 1:50 neomycin sulfate solution. The other options fail to represent the concentration accurately, as they suggest much higher percentages that do not align with the established dilution ratio.