Explain how sulfur dioxide, as emitted by some power plants, ends up as sulfuric acid (h2so4), and sulfate ion (so42-) in rivers and lakes.
be brief, 2-4 sentences should be enough.

Explanation:

Sulphur dioxide is oxidised by the oxygen in the atmosphere to form sulphur trioxide, the major component in acid rain.

2SO2 + O2 - - > 2SO3

The subsequent Sulphur trioxide reacts with water in the rain/lake/river to form sulphuric acid.

SO3 + H20 - - > H2SO4

The sulphuric acid undergoes ionisation to form:

In major quantities ;

H2SO4 <> H+ + HSO4-

And

In smaller quantities to form sulphate ion;

H2SO4 <---> 2H+ + SO4^-2

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

window cleaner is ammonia dissolved in water. this is an example of a