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Alex Ar [27]
4 years ago
14

Hi :D

Chemistry
1 answer:
vazorg [7]4 years ago
4 0
Water: pH7
Lemon juice:pH2
Milk: pH6.5
Vinegar: pH2.4
Washing up liquid: pH5-6

:)
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An aqueous solution containing 17.5 g of an unknown molecular (nonelectrolyte) compound in 100.0 g of water has a freezing point
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Answer:

molar mass = 180.833 g/mol

Explanation:

  • mass sln = mass solute + mass solvent

∴  solute: unknown molecular (nonelectrolyte)

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  • ΔTc = - Kc×m

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∴ Kc H2O = 1.86 °C.Kg/mol

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⇒ mol solute = ( 0.9677 mol/Kg) × ( 0.100 Kg H2O )

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⇒ Mw solute = ( 17.5 g ) / ( 0.09677 mol )

⇒ Mw solute = 180.833 g/mol

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