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
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Sodium chloride NaCl
Calcium chloride CaCl2
What do you know about colligative properties?
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:
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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?
kinda lost me there
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?
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 .