Quiz 1 Kimdas II

Which following oxides as acid and amphoteric (a) CO2, (b) K2O, (c) N2O5, (d) SnO2, (e) CO

• CO and SnO2

• K2O and Al2O3

• N2O5 and CO

• N2O5 and SnO2

• K2O and CO

Which indicator you would use for the titrations of HNO3 versus NaOH

• Phenolphthalein

• Thymol blue

• Methyl orange

• Bromophenol blue

Which of the following solutions can not be classified as buffer systems? (a) KH2PO4/Na2HPO4, (b) HNO3/KNO3, (c) NH4Cl/NH3, (d) KF/HF (e) Na2CO3/NaHCO3.

• (a) KH2PO4/Na2HPO4

• (b) HNO3/KNO3

• (c) NH4Cl/NH3

• (d) KF/HF

• (e) Na2CO3/NaHCO3.

Predict the stronger acid of the oxoacids in each of the following groups: (a) HCl, HBr, and HI; (b) H3PO4 and H3PO3

(Bond Entalphy for HCl: 431.9; HBr: 366.1; HI: 298.3)

• HCl and H3PO3

• HI and H3PO4

• HBr and H3PO3

• HI and H3PO3

• HCl and H3PO4

Predict the change of pH after CH3COONa was added to CH3COOH solution?

• Increase the pH

• Decrease the pH

• Remain the same pH

A 75.00-mL portion of a solution that is 0.0460 m in HClO4 is treated with 150.00 mL of 0.0230 m KOH(aq). Is the pH of the resulting mixture greater than, less than, or equal to 7.0?

• pH>7

• pH=7

• pH<7

Calculate the pH of a solution of 0.1 mol of HC2H3O2 and 0.2 mol of NaC2H3O2

in 1.00 L of solution. Ka= 2 x 10^-5

• HF

• HNO2

• HClO2

• H3PO4

• 4.81

• 7.00

• 9.19

• 5.11

• 8.89

Which one(s) of the following is triprotic acids?

• H2C2O4

• CH2O

• HCHO

• H3C6H5O7