One solution turns blue. A possible hydrogen ion concentration for this solution is: 1 × 10-2 M 5 × 10-2 M 5 × 10-4 M 1 × 10-8 M

1×10^-8 M

Explanation:

Since the solution turns blue, it means the solution is a base. Now, we shall determine the pH to know the possible hydrogen ion concentration for this solution.

1. pH = - log H+

H+ = 1×10¯² M

pH = - log 1×10¯²

pH = 2

2. pH = - log H+

H+ = 5×10¯² M

pH = - log 5×10¯²

pH = 1.3

3. pH = - log H+

H+ = 5×10¯⁴ M

pH = - log 5×10¯⁴

pH = 3.3

4. pH = - log H+

H+ = 1×10^-8 M

pH = - log 1×10^-8

pH = 8

A pH reading between 0 and 6 indicates an acid solution. A pH reading of 7 indicates a neutral solution. A pH reading between 8 and 14 indicates an alkaline/basic solution.

From the above calculations, we can see that the solution gives a pH of 8 indicating a basic solution when the hydrogen ion concentration is 1×10^-8 M

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

1 is the answer to this problem