exam review 3/30

angles

100

the angle of the bond if the electron geometry is linear

what is 180° ?

200

the angle of the bond if the molecular geometry is trigonal planar

what is 120° ?

300

the angle associated with tetrahedral geometries 

What is 90° ? or <90° ?

400

the angle associated with octahedral geometries

what is 90° ?

500

the angles associated with the molecular geometry trigonal pyramidal

what is 120° (equitorial) and 90° (axial) ?

bond polarity

100

Determine whether the bond polarity of HCl is polar or non-polar? 

H=(2.1), Cl=(3.0)

What is... Polar?

200

Determine whether the molecule CHCl₃ is polar or non polar.

what is ... polar?

300

Determine whether CH₄ is polar or non polar.

C=(2.5)

H=(2.1)

What is.. Non-polar?

400

Determine whether the molecule CO₂ is polar or non polar.

C= 2.5

O= 3.5

What is.. non-polar?

500

Determine whether the molecule NH₃ is polar or nonpolar?

What is... Polar?

chapter 18

100

1.0 L buffer solution contains 0.450 mol H₂C₂H₃O₂ and 0.450 mol NaC₂H₃O₂.                                             The pKa = 3.56

     Calculate the pH after adding 0.015 mol of NaOH to the buffer

What is a pH of 3.59?

200

A mixture of 0.20M CH₃COOH and 0.30M CH3COONa is given. Calculate the pH of the solution if the pKa of the acetic acid is 4.76.

What is... 4.94?

300

A 1.0 L buffer contains 0.350 mol of HClO and 0.450 mol of NaClO. The pKa value is 6.54. What is the new pH after adding 0.090 mole of NaOH to the buffer?

What is a pH of 6.86?

400

Consider the titration of a 25.0-mL sample of 0.175 M CH3NH2 with 0.150 HBr. Determine the pH at 5.0 mL of added acid. (73)

what is... 11.33?

500

Consider the titration fo a 20.0-mL sample of 0.105 M HC₂H3O2 with 0.125 M  NaOH. Determine the pH at 5.0 mL of added base.

What is... 4.37?

chapter 18

100

Consider the titration of 25.0 mL of 0.100 M HCl with 1.00 M NaOH. Calculate the pH after adding 25.0 mL of NaOH.

What is... 7?

200

Find the pH of a solution containing 0.020M C₃H₆O₃ and 0.073 M of C₃H₅O₃^- pKa of lactic acid is 3.74

what is... ~ 4.30?

300

A 1.0 L buffer contains 0.500 mol of HClO and 0.300 mol of NaClO. The pKa value is 6.54. What is the new pH after adding 0.120 mole of HCl to the buffer?

What is a pH of 6.00?

400

Consider the titration of 25.0 mL of 0.100 M HCHO₂ with 0.100 M NaOH. Calculate the pH after adding 5.00 mL of NaOH. 

what is... 3.14?

500

Consider the titration of 25.0 mL of 0.100 M HCl with 1.00 M NaOH. Calculate the pH after adding 30.00 mL of NaOH.

what is... 11.96?

final question

500

name 5 good things that have happened to you recently. 

good luck studying this weekend, I will see you all tomorrow!