Science Homework Help

Question 1

5 year old child requires amoxycillin suspension  125mg/5mL for an ear

infection.              

Express 125mg/5mL amoxycillin suspension as a % strength

 A. 1.5 %

B. 2.5 %

C. 5.5 %

D. 12.5 %

Question 2  Express 240mg/5mL as ratio strength

A. 1:10

B. 1:5

C. 2:100

D. 1:20

Question 3 Express 125mg/5mL amoxycillin suspension as a % strength

 A. 1.5 %

B. 2.5 %

C. 5.5 %

D. 12.5 %

Question 4

Betadine sore throat gargle® (conce) contains 7.5% w/v povidone iodine. The directions are to dilute 1mL of Betadine® to 20mL of water & gargle.

 • Part 1; What amount of povidone iodine is in 20mL of  the diluted gargle?

A. 37.5mg

B. 75mg

C. 0.75g

D. 3.75g

Part B

Betadine Ready to Use® sore throat gargle contains 10mg/mL w/v povidone iodine. Directions are; gargle 15mL of Betadine ready to use® (RTU)

Part 2; Is the amount of povidone iodine in 15mL of   Betadine ready-to-use® the same as 20mL of  the diluted gargle?

Question 5 

An RMO asks you to prepare one litre of a 1%  solution of sodium chloride.                                                                                However, you only have a 5% concentrated stock solution of NaCl available to you. 

How much of the 5% stock solution is required to make 1L of a 1% NaCl aqueous solution?

A. 50mL

B. 100mL

C. 200mL

D. 250mL

Start with the final concentration required in 1 litre,

Step 2; How much of the stock solution contains 10g of NaCl

Question 6

 A doctor has prescribed clonazepam capsules. The dose is 1.5mg once a day for 10 days. 

Show how you would make sufficient capsules, each weighing 450mg, for this prescription.

Question 7

How much NaCl is required to make 50mL of a stock solution, so that if 5mL of this stock solution is taken and diluted to 3L the final concentration is   1: 10,000 w/v?

Question 8

Q. 19 If 500mL of a 1:200 solution of KCl is diluted to  1L, what is the final ratio concentration?

A. 40:1

B. 1:40

C. 400:1

D. 1:400