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Unpoluted rain has a pH around 5.7 (very mild acid) but with typical levels of atmospheric polution in the US its pH is typically between 5.6 to 3.8 (mild acid) and exceptionally it can have a pH as low as 2 (fairly strong acidic) due to atmospheric polution such as Sulpher Dioxide which is disolved in the rain.
Typically a universal indicator would show yellow for unpoluted rain, orange for mildly poluted rain and red for very poluted rain.
What else can I help you with?
What colour do alkalis turn universal indicator?
Alkalis turn universal indicator blue or purple.
What colour would universal indicator turn in ethanol?
Universal indicator would likely turn red in ethanol, indicating that it is acidic.
What colour does universal indicator turn in dilute hydrochloric acid?
Universal indicator will turn red or pink in dilute hydrochloric acid.
What colour does citric acid turn an universal indicator?
Citric acid is a weak acid, so it would turn a universal indicator to orange or red.
What colour does sugar turn on the universal indicator?
Sugar typically turns yellow on universal indicator paper, indicating that it is acidic.
What colour will rainwater turn if you add a universal indicator?
black
What colour do alkalis turn universal indicator?
Alkalis turn universal indicator blue or purple.
What colour does universal indicator turn in dilute hydrochloric acid?
Universal indicator will turn red or pink in dilute hydrochloric acid.
What colour would universal indicator turn in ethanol?
Universal indicator would likely turn red in ethanol, indicating that it is acidic.
What colour will universal indicator turn when mixed with a weak alkali?
Universal indicator will turn purple or blue when mixed with a weak alkali.
What colour does copper chloride turn in Universal indicator?
Bronze
What colour does citric acid turn an universal indicator?
Citric acid is a weak acid, so it would turn a universal indicator to orange or red.
What colour does sugar turn on the universal indicator?
Sugar typically turns yellow on universal indicator paper, indicating that it is acidic.
What color do alkalis turn universal indicator?
When universal indicator is put in water soluion of alkalis (base) it indicates significant blue colour.
What colour will universal indicator turn when mixed with a strong alkali?
Universal indicator will turn dark blue or purple when mixed with a strong alkali.
What colour will universal indicator turn when mixed with a neutral substance?
blue
What colour does the universal indicator turn with toothpaste?
The universal indicator generally turns blue or purple with toothpaste, indicating that the toothpaste is basic.
