Chemistry
posted by Emma .
I need to know how to dilute a 1L IV bag of 0.45% NaCl with 3.5% NaCl water to make it a drinkable 0.9% NaCl

The question is written in a very odd way. There is no need add more NaCl to make the 0.45% drinkable as it is already drinkable.
However, in the spirit of the question, we need to add v ml of the 3.5% solution (=sea water!) to 1 liter and end up with 0.9%.NaCl. So the starting solution contains 4.5 g NaCl (I am assuming that the % is w/volume) we need to end up with
(1000+0.0045)+(vx0.035)g salt
in 1000+v ml
and these two divided x 100/1 = 0.9%
so
[(1000+0.0045)+(vx0.035)]x100/(1000+v)=0.9%
solve for v
I got 4.5 = 8.965V+0.009V^2
if we assume that v is small
I got v=8.965/4.5 = 1.99 ml
But check my maths.
Respond to this Question
Similar Questions

chemistry
In a laboratory experiment, a 18.0 ml sample of NaCl solution is poured into an evaporating dish with a mass of 24.00 g. The combined mass of the evaporating dish and NaCl solution is 37.15g. After heating, the evaporating dish and … 
chemistry
The solubility of NaCl in water is 35.7 g NaCl/100 g H2O. Suppose that you have 500.0 g of NaCl. What is the minimum volume of water you would need to dissolve it all? 
chemistry
The solubility of NaCl in water is 35.7g NaCl/100g H2O. Suppose that you have 500.0g of NaCl. What is the minimum volume of water you would need to dissolve it all? 
chemistry
The solubility of NaCl in water is 35.7g NaCl/100g H2O. Suppose that you have 500.0g of NaCl. What is the minimum volume of water you would need to dissolve it all? 
bio
You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl 
science
answer to water conductance lab on conductivity of solutionof 500ppm of nacl,1,000 ppm of nacl,5,000ppm og nacl and 10,000ppm of nacl 
science
In the lab you need to make 1.00 L of a 0.300 M NaCl solution. You had previously made a 0.950 M NaCl solution that you can dilute to form your new solution. How many mL of the concentrated solution would you use to make the dilute … 
Math
How would you go about making 250ml of a 20X stock solution of NaCl to dilute later to a final concentration of 50mM? 
Math(Please help) Thank you
How would you go about making 250ml of a 20X stock solution of NaCl to dilute later to a final concentration of 50mM? 
Chemistry
You are given a bottle of dry NaCl. Explain the procedures required to make 900mL of a 0.5M NaCl solution. The formula weight of NaCl is 58.4g/mole.