Stuck with Pre-Reg exam calculations?

[Asterix]

editted

[ghajini]

You need to add 2g of potassium chloride to a litre of sodium chloride 0.9% w/v. You have 10mL ampoules of 30% w/v potassium chloride. What volume of potassium chloride do you draw up?

30g in 100ml
30/100 *10 = 3g

3g in 10ml
3/10 = 0.3g in 1ml
2/0.3 = 6.6ml

Can anyone tell me if this answear is right?

[Asterix]

I get 6.6ml too.

30g/100ml = 2g/X cross multiply to work out x which is 6.6.

I am assuming the addition to the sodium chloride is there to confuse us.

[ghajini]

Thanks

I get 6.6ml too.

30g/100ml = 2g/X cross multiply to work out x which is 6.6.

I am assuming the addition to the sodium chloride is there to confuse us.

[Asterix]

dunno if its right, need someone like nik to tell us.

[Nik]

So, I could sit and work out these calcs and give you confirmation, but will I or anyone else be there in the exam to tell you that your answers are right ? With continuous practise you'll get the self-belief and confidence in your work.

[Asterix]

So, I could sit and work out these calcs and give you confirmation, but will I or anyone else be there in the exam to tell you that your answers are right ? With continuous practise you'll get the self-belief and confidence in your work.

I am pretty sure my answer is right

[ghibtah]

If 38% of methadone bottles in your pharmacy are blue and remaining 7750 bottles are brown.Then how many methadone bottles are blue?

[Asterix]

619 bottles are blue?

[Asterix]

38% of 7750 = 589. Add 589+7750 to get total amount of bottles = 8349.

8349-7750 brown = 619 blue