The concentration of a suspension of Alcaligenes faecalis is

The concentration of a suspension of Alcaligenes faecalis is 8.4 * 10⁵ org/ml.

Answer the following 2 questions using this information.

1. What is the concentration of a suspension with 3 ml of Alcaligenes plus 5 ml of TSB?

2. of 8ml of Alcaligenes plus 10 ml of TSB?

Solution

1. What is the concentration of a suspension with 3 ml of Alcaligenes plus 5 ml of TSB?

Answer:

Stock: 8.4 * 10^5 org/ml.

Fold Dilution= (3mL + 5mL)/3mL

= 2.6

Final concentration = stock/ fold dilution

=(8.4 * 10^5)/2.6

=3.2 x 10^5 org/ml.

2. of 8 ml of Alcaligenes plus 10 ml of TSB?

Answer:

Fold Dilution= (8mL + 10mL)/8mL

= 2.25

Final concentration = stock/ fold dilution

=(8.4 * 10^5)/2.25

=3.73 x 10^5 org/ml.

=