They only ionize in water (usually 1% - 10%%)k.Non-Electrolyte – A substance that does not exist in ionic form in aqueous solution. Theyare poor electrical conductors and don’t readily dissociate into ions when melted or dissolved. 4.What is the molarity of a solution that contains 48 g of NaCl in 2.50 L of solution?a.M = n/v i.48g = ___ x 2.5 x 58.44 = 0.3284 mol5.What is the concentration, in mass percent, of a solution prepared from 25.0 g Mg(OH)2and 75.0 g of water? Weight/volume25g/0.75L = 33.33%
6. How many equivalents are present in 0.5 moles of Al3+? Al3+can accept 3 electrons.hence 1 mol of Al3+= 3 equivalent.thus 0.5 mol of Al3+= 0.5×3= 1.5 equivalent.7.Compare how the solubility of a gas dissolved in a liquid changes with temperature with that fora solid dissolved in a liquida.Solubility of gas in liquid decreases with temperature because with increasing temperature kinetic energy og the gas increases and hence there is greater probability ofthe gas to escape from the liquid.Solubility of solids in liquid increases in liquid. Because, an increase in temperature increases the kinetic energy of the solvent molecules which will break apart the solvent molecules more effectively which are held together by various intermolecular forces.
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- Fall '10