Chapter 9: Solutions

9 What is the initial volume, in milliliters, needed to prepare each of the following diluted solutions? (9.5)

a.$250\mathrm{mL}$of $3.0\%(\mathrm{m}/\mathrm{v})\mathrm{HCl}$from $10.0\%(\mathrm{m}/\mathrm{v})\mathrm{HCl}$

b. $500.\mathrm{mL}$of $0.90\%(\mathrm{ma}/\mathrm{v})\mathrm{NaCl}$from $5.0\%$(m/v) $\mathrm{NaCl}$

c. 350 . mL of $2.00\mathrm{MNaOH}$from 6.00 M NaOH

What is the initial volume, in milliliters, needed to prepare each of the following diluted solutions? $\left(9.5\right)$

a. $250$$mL$of $3.0$% $\left(m/v\right)HCI$from $10.0$% $\left(m/v\right)HCI$

b. $500$. $mL$of $0.90$% role="math" localid="1652626186960" $\left(m/v\right)NaCI$from $5.0$% role="math" localid="1652626200339" $\left(m/v\right)NaCI$

c. $350$. $mL$of $2.00$$MNaOH$from $6.00$$MNaOH$

Indicate whether aqueous solutions of each of the following solutes contain only ions, only molecules, or mostly molecules and a few ions:

a. Acetic acid, $H{C}_2{H}_3{O}_2$, a weak electrolyte.

b. $NaBr$, a strong electrolyte.

c. fructose,$C_6{H}_{12}{O}_6$, a nonelectrolyte.

What is the initial volume, in milliliters, needed to prepare each of the following diluted solutions? (9.5)

a. $250mL$of $5.0\%\left(m/v\right)$glucose from $20.\%\left(m/v\right)$glucose

b. $45.0mL$of $1.0\%\left(m/v\right)Ca{\mathrm{CI}}_2$from $5.0\%\left(m/v\right){\mathrm{CaCI}}_2$

c.$100.mL$of$6.00M{H}_{2}S{O}_4$from$18.0M{H}_{2}S{O}_4$

What is the final volume, in milliliters, when $25.0mL$. of each of the following solutions is diluted to provide the given concentration? $\left(9.5\right)$

a. $10.0\%\left(m/v\right)HCI$solution to give a $2.50\%\left(m/v\right)HCI$solution

b. $5.00MHCI$solution to give a $1.00MHCI$solution

c. $6.00MHCI$solution to give a $0.500MHCI$solution

What is the final volume, in millilitres, when 25.0 mL of each of the following solutions is diluted to provide the given concentration?

a. 10.0% (m/v) HCL solution to give a 2.50% (m/v) HCL solution

b. 5.00M HCL solution to give a 1.00M HCL solution

c. 6.00M HCL solution to give a 0.500M HCL solution

What is the final volume, in milliliters, when $5.00\mathrm{mL}$of each of the following solutions is diluted to provide the given concentration? $\left(9.5\right)$

a. localid="1653294892486" $20.0\%(\mathrm{m}/\mathrm{v})\mathrm{NaOH}$solution to give a$4.00\%(\mathrm{m}/\mathrm{v})\mathrm{NaOH}$solution

b. $0.600\mathrm{M}\mathrm{NaOH}$the solution to give a $0.100\mathrm{M}\mathrm{NaOH}$solution

c. $16.0\%(\mathrm{m}/\mathrm{v})\mathrm{NaOH}$solution to give a $2.00\%(\mathrm{m}/\mathrm{v})\mathrm{NaOH}$solution

In a laboratory experiment, a 10.0-mL sample of $\mathrm{NaCl}$solution is poured into an evaporating dish with a mass of $24.10\mathrm{g}$. The combined mass of the evaporating dish and $\mathrm{NaCl}$solution is $36.15\mathrm{g}$. After heating, the evaporating dish and dry $\mathrm{NaCl}$have a combined mass of $25.50\mathrm{g},(9.4)$

a. What is the mass percent$(\mathrm{m}/\mathrm{m})$of the $\mathrm{NaCl}$solution?

b. What is the molarity (M) of the $\mathrm{NaCl}$solution?

c. If water is added to $10.0\mathrm{mL}$of the initial $\mathrm{NaCl}$solution to give a final volume of $60.0\mathrm{mL}$, what is the molarity of the diluted $\mathrm{NaCl}$ solution?

In a laboratory experiment, a 15.0-mL sample of $\mathrm{KCl}$solution is poured into an evaporating dish with a mass of 24.10 g.

The combined mass of the evaporating dish and $\mathrm{KCl}$solution is 41.50 g . After heating, the evaporating dish and dry $\mathrm{KCl}$have a combined mass of 28.28 g.

a. What is the mass percent $(\mathrm{m}/\mathrm{m})$of the $\mathrm{KCl}$solution?

b. What is the molarity $\left(\mathrm{M}\right)$of the $\mathrm{KCl}$solution?

c. If water is added to 10.0 mL of the initial $\mathrm{KCl}$solution to give a final volume of 60.0 mL, what is the molarity of the diluted $\mathrm{KCl}$solution?

In a laboratory experiment, a $15.0‐\mathrm{mL}$sample of $\mathrm{KCl}$the solution is poured into an evaporating dish a mass of $24.10\mathrm{g}$. The combined mass of the evaporating dish and $\mathrm{KCl}$solution is $41.50\mathrm{g}$. After heating, the evaporating dish and dry $\mathrm{KCl}$have a combined mass of $28.28\mathrm{g}.(9.4)$

a. What is the mass percent localid="1653296764554" $\left(\mathrm{m}/\mathrm{m}\right)$of the $\mathrm{KCl}$solution?

b. What is the molarity $\left(\mathrm{M}\right)$of the $\mathrm{KCl}$solution?

c. If water is added to $10.0\mathrm{mL}$of the initial $\mathrm{KCl}$solution to give a final volume of $60.0\mathrm{mL}$, what is the molarity of the diluted $\mathrm{KCl}$solution?