When it rains heavily, which is cleaner to receive rootless water from the sky from the mountains in

I think it's the mineral water that's cleaner, because the rootless water in the sky may be polluted.

Mineral water, rainwater would have been clean, but the air was dirty, etc.

The water is already contaminated after receiving it, while the mineral water is purified.

Of course, it's mineral water, after all, it's still treated with some bacteria.

It is still relatively clean mineral water, and rainwater is generally more pollutant now.

I think it may be that the mineral water is relatively clean, and the current environmental pollution is too serious, and there is a lot of dust in the air.

Of course, mineral water is cleaner, after all, mineral water is passed. Some are processed.

It should be mineral water, and the spring water connected to the mountains in the countryside still has certain impurities.

I think it's still mineral water, after all, it has been processed in a series of ways.

Mineral water. Because some impurities in the mineral water have been treated, it will be cleaner.

Such rootless water is undoubtedly unclean. On the contrary, mineral water, taken from the mountains, is then processed to be cleaner.

When the water vapor condenses to a certain extent, the buoyancy of the air can no longer bear it, and it will fall to the ground, forming rain. In the process of "traveling" to the ground, the rain will bring many "little friends", such as the smoke particles emitted from the factory, the dust above the ground, and even the bacteria in the air will also take the opportunity to mix in. Therefore, when the rain fell to the ground exhausted, it was already dry.

The current rain is not the water it used to be, after all, the mineral water has been processed and can be drunk and eaten directly, and the rootless water is originally the rain that falls directly from the sky or the leakage that condenses on the leaves.

Compared with the rootless water in the sky from the rural mountains, I think the mineral water has changed to be cleaner.

I think the mineral water is cleaner, but the rain is actually not clean.

At high temperatures, many of the microorganisms present in the water have become extinct, and drinking such water is much cleaner than rootless water.

In the process of "traveling" to the ground, rain will carry a lot of substances.

Mineral water, rainwater would have been clean, but the air was dirty, etc.

The water is already contaminated after receiving it, while the mineral water is purified.

(1) The well water contains a large amount of calcium ions, magnesium ions and other ions, and the hardness is greater than that of rainwater; pH test paper can be used to measure the acidity and alkalinity of rainwater;

2) The function of activated carbon is adsorption, and the device only purifies the pit water, and cannot convert hard water into soft water

Therefore, the answer is: (1) well water; pH test strips; (2) adsorption; No, you can't