How to get different pH levels of water????

Question

I'm doing an experiment where I am growing 10 radish seeds each in 5 germination bags (plastic bags) with each lined with Paper Towel. There has to be 5 levels of the independent variable and I chose the pH level of the water on the paper towels. But how do you get different pH levels of the water? The control will be the bag with water with a pH level of 7.

Answer 1

The best device that can really help you is what we call a digital pH meter. This apparatus is available in the labortory. It accurately measures the pH of a substance when you dip the pH meter tip into the solution. Ask a lab technician on how to use it.
To have different pH levels of water, you need an acid to lower the pH from 7 down to 1, and a base to raise it form 7 up to 14. There are a lot of laboratory chemicals you can use to add into the water to raise or lower the pH. You can use hydrochloric acid (also known as Muriatic acid) as ACID and sodium hydroxide (also known as caustic soda) as BASE. All you need to do is just add different amounts of the acid or base into the water, and measure the pH using a pH meter.

Answer 2

You could add the following household products to four of the bags:

1. Coca-cola (acidic)
2. Vinegar (acidic)
3. Baking soda (basic)
4. Ammonia (basic)

Of course the fifth bag, you wouldn't add anything. I'd also be careful about assuming the pH of the water is 7.

Answer 3

You go to your local chemistry student and ask him about buffer solutions, which are produced by a weak acid and a alkaline salt of the acid or a weak base and a halide salt of the anion of the base.

Answer 4

add viniger to make it higher