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In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. How many molecules of substance Bare produced when 28.3 g of substance A reacts? The molar mass of substance A is 26.5 g/mol.
The only two substances that are of interest to you are $"A"$ and $"B"$, so you can write the chemical equation as $color(red)(2)"A" + ... -> color(blue)(3)"B" +...
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Is a substance that is present in a solution in a smaller amount and is dissolved by the solvent called the solute?
The dispersing medium is generally called the , and the stuff in solution, even at high concentration, is called the . When we deal with aqueous , the molar concentration...
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If $"0.64 g"$ of napthalene ($M = "128.1705 g/mol"$) is dissolved in $"100 g"$ a certain solvent ($T_f^"*" = 6^@ "C"$), whose $K_f = 20^@ "C"cdot"kg/mol"$, what is the new freezing point of the solvent?
$(b)$ That's a high $K_f$... If it weren't for the low concentration, $T_f$ may have gotten down to $-1^@ "C"$. What would the be if the answer were $(a)$?...
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A pitcher contains 2 L of a solution whose concentration is 25 g/L. How many grams of solvent would be in 1L of the solution?
This is a great example of a problem that provides you with information that you do not need. Notice that you are told that the solution has a volume...
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If a solvent contains a few impurities, how does its boiling point compare to the pure solvent?
Usually, the boiling point of a liquid has a rising temperature gradient. Impurities elevate the boiling point, and the elevation is proportional to their concentration. As the distillation proceeds,...
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How does adding a solute to a solvent affect the boiling point of the solvent?
This is an example of a so-called $"colligative property"$, a property that depends on the NUMBER of particles that you dissolve in the . When we dissolve a non-ionic in...
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How does the boiling point of a solution evolve with INCREASED number of particles in solution? How would the boiling point increase given $0.1*mol*L^1$ concentrations of $NaCl$, and $BaCl_2$ in a water solvent?
The boiling point of a solution........RISES according to the number of species in the solution. Both glucose, and urea are molecular. On the other hand, the $"barium chloride"$, and $"sodium...
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The concentration unit molarity may be expressed with the units of moles solute per liter of solution. What is a solute, a solvent, and how does a solution differ from a solvent?
A solution is the result of the solvent dissolving the solute so there is at least one more substance in the solution than there was in the original solvent....
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Because it will dissolve so many solvent, what substance is sometimes called the universal solvent?
Believe it or not most materials, molecular or ionic, express some water solubility. Because of its dipolar nature, i.e. $""^(delta+)H-stackrel(-delta)O-H^(delta+)$, water is a superb for many ionic species; and also...
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Will adding a solute to a solvent raise the freezing point of the solvent?
$"Freezing point depression"$ is a so-called $"colligative property"$, and the depression of the freezing point (i.e. $"fusion point"$) of the is proportional to the numbers of species of in that...
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