The approximate pH of rainwater is?

Question

a). 5.6

(B). 7.0

(C). 6.5

(D). 7.5

Answer 1

supposedly as neutral as neutral can be....7.0

Answer 2

Yaa a)

Rainwater is slightly acidic!

This is because it contains carbonic acid.

Rainwater with a ph value below 5.6 is considered as acid rain.

Answer 3

a)

;-) Diane

Answer 4

okay Tip --- Di Water has a pH of 7, its nuetral.

Anything greater than 7 is basic (i.e. NaOH). so we know that it not D, because (acid rain lol) .

okay so we have eliminated B and D

Next lets make sense of A and C. Okay C is close to nuetral , but it is slightly acidic. Viable Option  but it seems a little too close to nuetral . Carbon Dioxide + Water ---> A carbonic acid. So.. we can toss that . The final result is  A.

Answer 5

a). 5.6 is the best answer of the four:

The pH of "normal" rain has traditionally been given a value of 5.6. However scientists now believe that the pH of rain may vary from 5.6 to a low of 4.5 with the average value of 5.0.

See second figure on left site:

http://www.elmhurst.edu/~chm/vchembook/1...

and reaction/formula of "normal" rain + CO2:

http://wiki.answers.com/Q/What_is_the_pH...