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Only possible to calculate approximately (without knowing densities of all solutions) when 'percent' means 'gram per 100 ml' or 'ml per 100 ml'

Solve the following equations to find V1 and V2:

  • 7% * V1 (ml) + 45% * V2 (ml) = 15% * 800 (ml)
  • V1 (ml) + V2 (ml) = 800 (ml) [Especially this 2nd equation in an approximation]

Outcome: 632 and 168 ml respectively, but this is an approximation! (due to the ignoring of volume contraction: mixing will result in LESS ml's than 800 ml, so concentration will be more than 15%)

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13y ago
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Q: How much 7 percent NaCl soln and 45 percent Nacl sol req'd to make 800ml 15 percent NaCl soln?
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