Question

How much water, in liters, must be added to 0.5 L of 6 M HCl to make it 2 M?

Answer 1

How many liters of 0.2805 M C6H12O6(aq) contain 1.000 g of C6H12O6? 
a) 0.001557 L b) 0.01979 L c) 0.2805 L d) 3.565 L e) 50.5 L 


2. If 5.15 g Fe(NO3)3 is dissolved in enough water to make exactly 150.0 mL of solution, what is the molar concentration of nitrate ion? 
a) 0.00319 M b) 0.0343 M c) 0.142 M d) 0.313 M e) 0.426 M 

3. What is the mass of sodium iodide in 50.0 mL of 2.63  10-2 M NaI(aq)? 
a) 0.00132 g b) 0.00877 g c) 0.0788 g d) 0.197 g e) 78.8 g 

4. If 25.00 mL of 4.50 M NaOH(aq) is diluted with water to a volume of 750.0 mL, what is the molarity of the diluted NaOH(aq)? 
a) 0.0333 M b) 0.150 M c) 0.155 M d) 6.67 M e) 1.35 × 103 M 


5. What volume of 0.15 M HCl(aq) must be diluted to make 2.0 L of 0.050 M HCl(aq)? 
a) 0.015 L b) 0.10 L c) 0.30 L d) 0.67 L e) 6.0 L 

6. What is the pH of 0.51 M HCl(aq)? 
a) -0.29 b) 0.29 c) 0.31 d) 0.51 e) 0.67 

7. The pH of an aqueous NaOH solution is 13.17. What is the hydrogen ion concentration of this solution? 
a) 6.8 × 10-14 M b) 1.9 × 10-6 M c) 0.89 M d) 1.1 M e) 1. 5 × 1013 M

8. The pH of a vinegar solution is 4.15. What is the H3O+ concentration of the solution? 
a) 7.1 × 10-5 M b) 1.6 × 10-2 M c) 0.62 M d) 1.4 M e) 1.4 × 104 M 

9. An aqueous nitric acid solution has a pH of 1.15. What mass of HNO3 is present in 2.0 L of this solution? 
a) 0.071 g b) 0.14 g c) 2.2 g d) 4.5 g e) 8.9 g 

10. Iron reacts with hydrochloric acid. 
Fe(s) + 2 HCl(aq) → FeCl2(aq) + H2(g) 
What volume of 2.55 M HCl(aq) will react with 35.0 g Fe(s)? 
a) 0.246 L b) 0.492 L c) 1.60 L d) 3.20 L e) 27.5 L 


11. What volume of 0.200 M Na2SO4(aq) will completely react with 50.0 mL of 0.135 M Ba(NO3)2(aq)? 
Na2SO4(aq) + Ba(NO3)2(aq) → BaSO4(s) + 2 NaNO3(aq) 
a) 33.8 mL b) 67.5 mL c) 74.1 mL d) 148 mL e) 540. mL 

12. A mass of 0.4113 g of an unknown acid, HA, is titrated with NaOH. If the acid reacts with 28.10 mL of 0.1055 M NaOH(aq), what is the molar mass of the acid? 
a) 2.965 × 10-3 g/mol 
b) 9.128 g/mol 
c) 138.7 g/mol 
d) 337.3 g/mol 
e) 820.7 g/mol 

13. A 25.00 mL sample of KOH is titrated with 21.83 mL of 0.2120 M HCl(aq). What is the concentration of the KOH solution? 
a) 0.0006720 M b) 0.002574 M c) 0.1851 M d) 0.2428 M e) 4.119 M