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Identify each of these substances as acidic, basic, or neutral.

[tex]$\square$[/tex] Pure water, [tex]$pH = 7.0$[/tex]

[tex]$\square$[/tex] Lake water, [tex]$pH = 6.5$[/tex]

[tex]$\square$[/tex] Baking soda solution, [tex]$pH = 9$[/tex]

[tex]$\square$[/tex] Soapy water, [tex]$pH = 12$[/tex]

Sagot :

GinnyAnswer
Let's classify each substance based on its pH value:

1. Pure water (pH = 7.0):
- The pH scale ranges from 0 to 14, where a pH of 7 is considered neutral.
- Since the pH of pure water is exactly 7.0, it is neutral.

Therefore, pure water is neutral.

2. Lake water (pH = 6.5):
- A pH value less than 7 indicates an acidic substance.
- Since the pH of lake water is 6.5, which is less than 7, it is acidic.

Therefore, lake water is acidic.

3. Baking soda solution (pH = 9):
- A pH value greater than 7 indicates a basic (or alkaline) substance.
- Since the pH of the baking soda solution is 9, which is greater than 7, it is basic.

Therefore, the baking soda solution is basic.

4. Soapy water (pH = 12):
- A pH value greater than 7 indicates a basic substance.
- Since the pH of soapy water is 12, which is significantly greater than 7, it is basic.

Therefore, soapy water is basic.

In conclusion:
- Pure water is neutral.
- Lake water is acidic.
- Baking soda solution is basic.
- Soapy water is basic.
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