anonymous
  • anonymous
Using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. Use 3 – 4 sentences in your explanation
Chemistry
jamiebookeater
  • jamiebookeater
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Photon336
  • Photon336
Sodium chloride NaCl Calcium chloride CaCl2 What do you know about colligative properties?
anonymous
  • anonymous
nothing really
Photon336
  • Photon336
Okay read this and let me know if you get it as I describe the concepts. Colliagitve properties (just means the number of molecules) like how much stuff you're putting into a solution: |dw:1440990542329:dw| Got this?

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anonymous
  • anonymous
yes
Photon336
  • Photon336
Ok, now another concept: When we dissolve a solute in say a solvent two things happens: it lowers the freezing point, and elevates the boiling point. Generally speaking when we add something to a solution it increases the boiling point and lowers the freezing point, does this make sense and can you tell me why? |dw:1440990898267:dw|
anonymous
  • anonymous
kinda lost me there
Photon336
  • Photon336
|dw:1440991272570:dw|
Photon336
  • Photon336
Let's say for this I have two solutions: Solution A I put salt in water solution B nothing it's just water. First can you tell me what the solute is in each case?
Photon336
  • Photon336
Rushwr
  • Rushwr
Colligative properties depend on the number of particles present, are involved. So considering their reactions I got these two CaCl2(s) --> Ca2+ + 2Cl- .. three particles NaCl(s) --> Na+ + Cl- .. two particles A higher molarity of a solution lowers the freezing point more. Since CaCl2 contains more number of particles and due to it's higher molarity it lowers the freezing point more than NaCl .

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