Week 7 - Calculating and preparing common working solutions- etc Flashcards
- When diluting a sample, if your dilution ratio is 1:25, that means you have 1 part sample and how many parts diluent?
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- You have an Epsom salt solution that is 4.2mg/mL. You dilute it 1:2. What is the new concentration?
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- You add 2mL of fecal material to 13mL of water. What is the simplified dilution ratio?
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- You dilute a sample 1:4 and end up with 5mL of solution. What was your original sample volume?
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- A blood machine dilutes your serum sample 1:100 and reports a glucose concentration of 0.3mg/L in the dilution. What is the glucose concentration in the original sample?
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- If the blood machine in Question 5 reported a value of 2g/L for the hemoglobin of the original sample, what would the hemoglobin concentration of the 1:100 dilution be?
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- You have a 2mg/mL sample that you dilute 1:3. You take that new solution and dilute it 1:4. What is the final solution’s concentration?
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- You have a bottle of 100mg/mL Ketamine. You dilute part of it to make 10mg/mL Ketamine. Which is the stock solution?
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- In Question 8, which is the working solution?
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- What is the equation you should use when calculating values for working and stock solutions?
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- You take 2mL of stock solution and add 8mL of water to make a 12mg/mL working solution. What is the concentration of the stock solution?
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- You dilute a 500mg/mL solution to make 20mL of 25mg/mL solution. How much stock solution did you use?
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- You mix 3.6mL of 100mg/mL stock solution with 16mL of water. What is the concentration of you working solution?
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- You started with 4mL of 250mg/mL stock solution and made a 100mg/mL working solution. How much sterile water did you add?
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- What is 1:56 as a simplified concentration fraction?
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- If you reconstitute 5g of drug into a 10mL solution, what is the concentration in milligrams per milliliter?
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- What is 2.3% as a ratio concentration?
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- You mix 25mL of water with 3mL of 50mg/mL solution. What is the concentration of your working solution?
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- You make 30mL of 3mg/mL solution using a 33.3mg/mL stock solution. How much stock solution did you use?
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- You use 5mL of 45mg/mL solution to make a 20mg/mL solution. How much sterile water did you add?
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- You use 1.4mL of stock solution to make 15mL of 0.5mg/mL working solution. What is the concentration of your stock solution?
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- You have 2% Butorphanol. The veterinarian asks you to prepare 1 mL of 1.5 mg/mL Butorphanol. How much stock Butorphanol will you use?
Answer: 0.08 mL
The chemistry analyzer dilutes a blood sample 1:10,000 and reports that the patient has a blood glucose level of 24 mg/L. What was the glucose level of the diluted sample?
Answer: 2.4 mcg/L
The Chlorhexidine solution spray bottle is empty. The bottle holds 32 oz. Your stock Chlorhexidine solution is 4% concentration. You fill the bottle up 1/3 of the way with Chlorhexidine and the rest of the way with water. What is the concentration of your working solution rounded to the nearest whole number?
Answer: 1%
A vaccine comes as 0.25 g of powder. A diluent is added to make a 1 mL vaccine. What is the concentration?
Answer: 1:4
Directions: List the components and percentage strengths of the following IV solutions.
1. D5 1/4 NS
Answer: 5% Dextrose in 0.225% Saline
Directions: List the components and percentage strengths of the following IV solutions.
2. D20W
Answer: 20% Dextrose in water
Directions: List the components and percentage strengths of the following IV solutions.
3. D5RL
Answer: 5% Dextrose in Ringer’s Lactate
Directions: List the components and percentage strengths of the following IV solutions.
4. D10NS
Answer: 10% Dextrose in 0.9% saline
Directions: List the components and percentage strengths of the following IV solutions.
5. D5W
Answer: 5% Dextrose in water
- An IVPB is considered to be what type of line? (primary or secondary): _______________
Answer: Secondary line
- _______________ devices are used to administer small volumes of fluid and medication.
Answer: Volume control
- An IV is started in a client’s hand. This makes the IV what type of line? _______________
Answer: Peripheral line
Directions: Calculate the amount of dextrose and/or sodium in each of the following IV solutions.
9. 0.25 L D5 1/2 NS
dextrose: _____ g
NaCl: _____ g
Answer: 12.5 g Dextrose; 1.125 g NaCl
Directions: Calculate the amount of dextrose and/or sodium in each of the following IV solutions.
10. 800 mL D5 1/4 NS
dextrose: _____ g
NaCl: _____ g
Answer: 40 g Dextrose; 1.8 g NaCl
