Summative Problem Set I: Acids

1. State whether the following compounds will act as acids (A) or bases (B) when added to water.

a) ClO2 ...... ___

b) SrO...... ___

c) Cr2O3 ... ___

d) SeO2 .... ___

e) NO2 ..... ___

f) CO2 ...... ___

g) Cs2O ... ___

h) BaO ..... ___

i) SO3 ...... ___

j) Ag2O ..... ___

2.a) Define a basic anhydride -

?

b) Give three examples of basic anhydrides ___

3.a) Define an acidic anhydride - ?b) Give three examples of acidic anhydrides ?____ _____ ____

4.Give three examples of amphoteric (or amphiprotic) anhydrides.

The element other than oxygen in these is found near the ____ of the periodic table.

5.Normal (unpolluted) rain water usually has a pH of about _____. This is less than 7 due to __gas dissolving in the air.

6.Acid rain could be defined as rain having a pH below ___.

7.Fossil fuels containing the element ____ are a major cause of acid rain.

8.The element _____ reacts with oxygen in the cylinders of automobile motors to produce various nitrogen oxides.

9.Give the balanced equation for the formation of NO from its elements.

12.Give the balanced equation for the formation of NO2 from its elements.

13.Give the balanced equation for the formation of nitrous and nitric acid from NO2 dissolving in rain water.

14.Other than cars and fossil fuel burning power plants, what are some other sources ?of acid rain?

15.Explain why acid rain falling on one area may do less damage than the same acid rain falling in a different area.

16.Give four major unfavourable effects of acid rain.

a. ?

b.

c.

d.

17.Give four ways in which acid rain and the problems associated with it could be solved or at least helped

a.

b.

c.

d.

18.13.45 mL of 0.200 M NaOH is required to titrate 25.0 mL of a solution which is known to have HCl. Calculate the original [HCl]. Show all your steps.

19.13.45 mL of 0.200 M HCl is required to titrate 25.0 mL of a solution which is known to have Ba(OH)2. Calculate the original [Ba(OH)2]. Show all your steps.

20.13.45 mL of 0.200 M Sr(OH)2 is required to titrate 25.0 mL of a solution which is known to have HNO3. Calculate the original [HNO3]. Show all your steps.

21.What volume of 0.100 M NaOH would be required to titrate 35.0 mL of a 0.231M solution of H2C2O4. Show all your steps.

22.Consider the following 0.100 M solutions: I. HF II. HBr III. H2SO4 ?The equivalence point is reached when 10.00 mL of 0.100 M NaOH has been added to 10.00 mL of solutions

A. IIonly

B. IandIIonly

C. IIandIIIonly

D.I,IIandIII

23.a) Write the balanced formula equation for the titration between sulphurous acid ?and potassium hydroxide.

b) Write the balanced net-ionic equation for the titration between sulphurous acid and potassium hydroxide.

1. Given the following data

a) Which beaker would require the greatest volume of 0.1M HCl for complete neutralization? ____

.b) What volume of 0.1M HCl would be needed for the neutralization in (a)? ?Answer ___mL

.c) Which beaker would require the least volume of 0.1M HCl for complete ?neutralization? ___

.d) What volume of 0.1M HCl would be needed for the neutralization in (c)? ?Answer ___mL

1. Calculate the mass of NaOH which is required to neutralize 15.00 mL of

0.350 M H2SO4?

Answer __grams 26. When a 0.1 M strong base titrates a 0.1 M weak monoprotic acid, it takes

(less/more/the same)_____ volume of the base as it would to titrate a 0.1 M strong monoprotic acid.