In an experiment, a scientist compares the effect of adding acid rain to
2 answers:
Answer: Lake Minnetonka water is buffered instead of Upper Kintla Lake water that doesn´t have molecules to "muffle" the acid rain added.
Explanation:
When Adding Acid or a Base to a sample, and its pH doesn´t change, it will tell us that something is happening and <u>there must be some molecules in the sample that are reacting with the Acid or Base added </u>and that is why, the sample´s pH stay the same. These "molecules" muffle the Acid or Base, and they are called "buffer".
As you can see in the image below, there is an example with a typical Bicarbonate Buffer when adding HCl, the Bicarbonate molecules will react with the HCl, making it to change in other molecule, and losing its acid power.
<em>When the Acid Rain was added to the Upper Kintla Lake sample,</em> the pH changed instantly, because there were any molecule to react with the HCl added and HCl molecules remain the same, making the pH to drop from 7.5 to 5.2
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Answer:
A source of electricity, a wire coil, and an iron core
Explanation:
An electromagnet has three critical components:
1. A source of electricity
This is often a battery.
It generates the electric current that produces the magnetic field.
2. A wire coil
The wire carries the electric current.
Stacking the wire into loops makes a stronger magnetic field.
The more loops in the coil, the stronger the field.
3. An iron core
An iron core greatly increases the strength of the magnetic field within it and at its ends.
