Problem 274
What are the mole fractions of solute and solvent in a solution prepared by dissolving \(98 \mathrm{~g} \mathrm{H}_{2} \mathrm{SO}_{4}\) (M.W. 98\()\) in \(162 \mathrm{~g} \mathrm{H}_{2} \mathrm{O}(\mathrm{M} \mathrm{W} .18) ?\)
Problem 275
A wine has an acetic acid \(\left(\mathrm{CH}_{3} \mathrm{COOH}, 60 \mathrm{~g}\right.\) / formula weight) content of \(0.66 \%\) by weight. If the density of the wine is \(1.11\) \(\mathrm{g} / \mathrm{ml}\), what is the formality of the acid?
Problem 276
2.3 \(\mathrm{g}\) of ethanol \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}\right.\), molecular weight \(=46 \mathrm{~g} /\) mole \()\) is added to \(500 \mathrm{~g}\) of water. Determine the molality of the resulting solution.
Problem 277
What is the molality of a solution in which \(49 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{SO}_{4}\), (MW 98) is dissolved in 250 grams of water?
Problem 279
Calculate the molarity of a solution containing \(10.0\) grams of sulfuric acid in \(500 \mathrm{ml}\) of solution. (MW of \(\mathrm{H}_{2} \mathrm{SO}_{4}=98.1 .\) )
Problem 280
Calculate the weight in grams of sulfuric acid in \(2.00\) liters of \(0.100\) molar solution. (MW of \(\mathrm{H}_{2} \mathrm{SO}_{4}=98.1 .\) )
Problem 281
Hydrogen peroxide solution for hair bleaching is usually prepared by mixing \(5.0\) g of hydrogen peroxide \(\left(\mathrm{H}_{2} \mathrm{O}_{2}\right.\), molecular weight \(=34 \mathrm{~g} /\) mole \()\) per \(100 \mathrm{ml}\) of solution. What is the molarity of this solution?
Problem 282
Each liter of human blood serum contains about \(3.4 \mathrm{~g}\) of sodium ions \(\left(\mathrm{Na}^{+}\right.\), ionic weight \(=23 \mathrm{~g} /\) mole \() .\) What is the molarity of \(\mathrm{Na}^{+}\) in human blood serum?
Problem 283
A \(10^{6}\) liter tank of seawater contains \(16,600 \mathrm{~kg}\) of chlorine (Cl^ ), \(9200 \mathrm{~kg}\) of sodium \(\left(\mathrm{Na}^{+}\right)\) and \(1180 \mathrm{~kg}\) of magnesium \(\left(\mathrm{Mg}^{++}\right) .\) Calculate the molarity of each. Is all the charge accounted for?
Problem 284
What mass of calcium bromide \(\mathrm{CaBr}_{2}\), is needed to prepare \(150 \mathrm{ml}\) of a \(3.5 \mathrm{M}\) solution? (M.W. of \(\mathrm{CaBr}_{2}=200.618\) \(\mathrm{g} / \mathrm{mole}\) )
