Ch 101 Chapter 12

Check all of the combinations of aqueous solutions from the past four questions that will give an extensive reaction. (You do not need to have the equations correct to answer this question correctly.) You should check anywhere from one to four boxes. None of these combinations will give an extensive reaction NaHSO4 and NaCN HClO4 and NaH2PO4 NaC2H3O2 and H3PO4 Na2HPO4 and H2CO3

NaHSO4 and NaCN HClO4 and NaH2PO4 NaC2H3O2 and H3PO4 Na2HPO4 and H2CO3

Write a balanced net equation for the reaction of Na2S with water.

S^2- (aq) + H_2O (l) <=> OH^1- (aq) + HS^1- (aq)

What is the approximate pH of a 1 M solution of H2S?

3.5

a solution of pH = 3 a solution of pOH = 9 a solution in which [OH1-] = 10-4M a solution in which [OH1-] = 10-8M

aaba

a) 0.1 M HClO4 or b) 0.2 M HClO4 c) 0.1 M NaClO or d) 0.2 M NaClO e) 0.1 M HF or f) 0.1 M HNO2 g) 0.1 M NaOH or h) pure water

bceh

What is the approximate pH of a 1 M solution of Na2CO3?

12.5

Consider the following solutions: A : 0.1 M H2CO3 B : 0.5 M H2CO3 C : 0.1 M NaCN D : 0.5 M NaCN E : 0.1 M NaCl F : 0.5 M NaCl G : 0.1 M NaNO2 H : 0.5 M NaNO2 I : 0.1 M HClO J : 0.5 M HClO Your responses should be a letter (A, B, ...etc.). Which solution would have the highest pH? Which solution would have the lowest pH?

D B

The hydrogen ascorbate anion has the chemical formula HC6H6O61-. Write a balanced net equation for the reaction of the hydrogen ascorbate anion with water where hydrogen ascorbate acts as an acid.

HC_6H_6O_6^1- (aq) + H_2O (l) <=> C_6H_6O_6^2- (aq) + H_3O^1+ (aq)

The hydrogen ascorbate anion has the chemical formula HC6H6O61-. Write a balanced net equation for the reaction of the hydrogen ascorbate anion with water where hydrogen ascorbate acts as an base.

HC_6H_6O_6^1- (aq) + H_2O (l) <=> H_2C_6H_6O_6 (aq) + OH^1- (aq)

Check all of the combinations of aqueous solutions from the past four questions that will give an extensive reaction. (You do not need to have the equations correct to answer this question correctly.) You should check anywhere from one to four boxes. None of these combinations will give an extensive reaction HNO2 and NaOH NH4Cl and Na2SO3 HBr and NH3 NaNO2 and NaH2PO4

HNO2 and NaOH HBr and NH3

Check all of the following that have an extensive reaction with water. You should check anywhere from one to four boxes. None of these have an extensive reaction with water. HNO3 HCN Na2S NH3

HNO3

Write a balanced net equation for the reaction of NH3 with water.

HNO_3 (aq) + H_2O (l) <=> NO_3^1- (aq) + H_3O^1+ (aq)

0.1 M KNO2 0.1 M NH4NO3 0.1 M Na2O 0.1 M NaClO4

babn

Write a balanced net equation for the reaction of HCN with water.

HCN (aq) + H_2O (l) <=> CN^1- (aq) + H_3O^1+ (aq)