How much water, in liters, must be added to 0.5 l of 6 m hcl to make it 2 m?
a. 0.33
b. 0.5
c. 1
d. 1.5
e. 2

How many liters of 0.2805 M C6H12O6(aq) contain 1.000 g of C6H12O6? 
a) 0.001557 Lb) 0.01979 Lc) 0.2805 Ld) 3.565 Le) 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 Mb) 0.0343 Mc) 0.142 Md) 0.313 Me) 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 gb) 0.00877 gc) 0.0788 gd) 0.197 ge) 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 Mb) 0.150 Mc) 0.155 Md) 6.67 Me) 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 Lb) 0.10 Lc) 0.30 Ld) 0.67 Le) 6.0 L 

6.What is the pH of 0.51 M HCl(aq)? 
a) -0.29b) 0.29c) 0.31d) 0.51e) 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 Mb) 1.9 × 10-6 Mc) 0.89 Md) 1.1 Me) 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 Mb) 1.6 × 10-2 Mc) 0.62 Md) 1.4 Me) 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 gb) 0.14 gc) 2.2 gd) 4.5 ge) 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 Lb) 0.492 Lc) 1.60 Ld) 3.20 Le) 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 mLb) 67.5 mLc) 74.1 mLd) 148 mLe) 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 Mb) 0.002574 Mc) 0.1851 Md) 0.2428 Me) 4.119 M

Ithink it's carbonic acid

Ithink the answer is a or d.