Using the list of chemical species:

• C6H12O6
  

• CH3OH

• H2SO4

• H2C2O4

• HCN

• NH3

• NaOH

• Sr(OH)2

• CaCl2

• NaCl



Answer the questions:

1. Which species should have neutral pH? Explain why.
   
2. Conductivity is measured in siemens (S), and the typical unit measured for solutions is S/cm.
   

The higher the value, the better the electrical conductivity. Which of the chemical species

from the manifest would you expect to have the highest conductivities?



Also using the data below, and the chemical species listed above, what is the suggested identity of each sample (list from 1-10):

Sample Conductivity

(S/cm)

pH Other characteristics

Tap water 7.5 x 10-5 6.52

Distilled water 2.7 x 10-6 5.54

1_____ 3.1 x 10-3 5.61 White crystalline solid

2____ 4.9 x 10-3 0.98 Dense, viscous liquid, turns paper black

3____ 3.8 x 10-6 5.73 Flammable, low viscosity liquid

4____ 2.9 x 10-3 13.21 White crystalline solid, solution is

slippery on skin

5____ 4.7 x 10-3 5.62 White crystalline solid

6_____ 4.6 x 10-4 8.27 Sharp odour, white crystalline solid

7_____ 7.6 x 10-4 2.91 Flammable, white crystalline solid

8_____ 4.3 x 10-5 5.70 Flammable, white powdery solid

9_____ 3.8 x 10-4 4.06 Flammable, low viscosity liquid

10_____ 5.2 x 10-3 13.48 White crystalline solid, solution is

slippery on skin