<p>Jill has two quarts of a 30 % acid solution and 3 pints of a 20 % solution. If he mixes them, what will be the concentration to the nearest percent of the resulting solutions?</p>
<p>a) 22 %
b) 23 %
c) 24 %
d) 25 %
e) 26 %</p>
<p>Please provide explanation too por favor</p>
<p>One can tell without any significant calculation that the answer is A as it’s the only answer above 25%; there is more of the 30% acid so it has to be greater than 25%.</p>
<p>The exact answer, if you’re wondering, is 25.7%. </p>
<p>First convert quarts to pints by multiplying the number of quarts by two. Then determine how many pints of acid there are in the solution and divide by the total number of quarts in the solution, which is 3+4=7.</p>
<p>[(4)(.3) + (3)(.2)]/7 = .257</p>
<p>but what is concentration exactly?</p>
<p>Concentration of an acid refers to molarity. Molarity is the number of moles of solute per liter of solution. Because the solvent (into what the solute is placed) is water, the more solute placed the stronger the acid is and the higher the percentage concentration.</p>
<p>Because there is more of the solution that has a higher solute to solvent ratio, the overall concentration will be higher than the unweighted average of the solutions’ concentrations, which is 25%. (E) is therefore the only possible answer.</p>
<p>hoiw do you know that it’s 25 %?</p>
<p>(20 + 30)/2</p>
<p>i don’t think cb will ever make you convert pints and quarts.</p>