Let's solve the worksheet step by step.
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Q.1: Fill in the blanks with suitable words.
a) The _________ measures how acidic or basic a substance is.
✔ Answer: *pH*
Explanation: The pH scale is used to measure the acidity or basicity of a solution.
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b) pH scale ranges from _________ to _________.
✔ Answer: *0* to *14*
Explanation: The pH scale spans from 0 (most acidic) to 14 (most basic).
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c) A solution has a pH of 7, it's ____________.
✔ Answer: *neutral*
Explanation: A pH of 7 indicates a neutral solution, like pure water.
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d) A pH less than 7 is an ________, with _________ numbers indicating stronger acids.
✔ Answer: *acid*, *lower*
Explanation: Solutions with pH < 7 are acidic, and the lower the number, the stronger the acid.
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e) A pH greater than 7 is a ________, with _________ numbers indicating stronger bases.
✔ Answer: *base*, *higher*
Explanation: Solutions with pH > 7 are basic, and higher numbers indicate stronger bases.
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Q.2: Fill the blanks with following words to identify ranges of the pH scale.
Words given:
- neutral
- acidic
- basic
Look at the diagram:
```
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
[Red] → [Orange/Yellow] → [Green] → [Blue/Purple]
Under the scale:
- Left bracket (0–6): _______
- Middle (7): _______
- Right bracket (8–14): _______
```
Left range (0–6): This is
acidic
Middle (7): This is
neutral
Right range (8–14): This is
basic
✔ So fill in:
- First box (left):
acidic
- Middle box:
neutral
- Last box (right):
basic
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✔ Final Answers:
####
Q.1:
a) The
pH measures how acidic or basic a substance is.
b) pH scale ranges from
0 to
14.
c) A solution has a pH of 7, it's
neutral.
d) A pH less than 7 is an
acid, with
lower numbers indicating stronger acids.
e) A pH greater than 7 is a
base, with
higher numbers indicating stronger bases.
####
Q.2:
From left to right:
-
acidic (0–6)
-
neutral (7)
-
basic (8–14)
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This completes the worksheet! Let me know if you'd like a visual explanation or a printable version.
Parent Tip: Review the logic above to help your child master the concept of ph scale worksheet middle school.
