- #1
Modrisco
- 8
- 0
A person suffering from Hypothermia has a sodium ion concentration in the blood of 0.114 M and a total blood volume of 5.1 L. What mass of sodium chloride needs to be added to the blood to bring sodium ion concentration up to 0.139 M? (assuming no change in blood volume)
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Atomic weight of Na: 230 g
Mass of sodium in blood:
230 x 0.114 M = 26.22 g
Mass of sodium needed:
230 x 0.139 = 32.97
32.97 - 26.22 = 5.72 g
5.72 g of sodium needed
Ratio of mass in NaCl
Mass of Cl : Mass of Nacl
35.453 g : 230 g
1 : 6.49
Mass of Cl in NaCl when Na is 5.72 g:
230/35.453 = 5.72/x
230x = 5.72(35.453)
230x = 202.79
x = 202.79/230
x = 0.88g
Mass of NaCl needed:
0.88g + 5.72g
= 6.6 g
Mass of NaCl needed 6.6g
Is this correct?
--------------------------------------…
Atomic weight of Na: 230 g
Mass of sodium in blood:
230 x 0.114 M = 26.22 g
Mass of sodium needed:
230 x 0.139 = 32.97
32.97 - 26.22 = 5.72 g
5.72 g of sodium needed
Ratio of mass in NaCl
Mass of Cl : Mass of Nacl
35.453 g : 230 g
1 : 6.49
Mass of Cl in NaCl when Na is 5.72 g:
230/35.453 = 5.72/x
230x = 5.72(35.453)
230x = 202.79
x = 202.79/230
x = 0.88g
Mass of NaCl needed:
0.88g + 5.72g
= 6.6 g
Mass of NaCl needed 6.6g
Is this correct?