They don't call it the Great SALT Lake for nothing. Water in the Great Salt Lake is about 25-percent salt. In other words, about one-fourth of the weight of the water comes from salt. Quite a bit. Most natural water has a pH of between 6-8, although acid rain can have a pH as low as 4.
Raindrops are tear-shaped .
When you think of a drop of falling water you probably think it looks like . When a drop of water comes out of a faucet, yes, it does have a tear shape. That is because the back end of the water drop sticks to the water still in the faucet until it can't hold on any more. Gravity and surface tension come into play here. As rain falls, the air below the drop pushes up from the bottom, causing the drop to flatten out somewhat.