Let's solve the worksheet step by step.
---
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
Now look at the diagram:
- From
0 to 6: This range is
acidic
- At
7: This is
neutral
- From
8 to 14: This range is
basic
So, fill in the boxes under the scale accordingly:
```
[acidic] [neutral] [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:
- First box (0–6):
acidic
- Middle box (7):
neutral
- Last box (8–14):
basic
---
✔ Completed Worksheet Summary:
```
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │
├───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┤
│ acidic │ neutral │ basic │
└───────────────────────────────────┴─────────────┴─────────────────┘
```
This correctly labels the pH scale!
Parent Tip: Review the logic above to help your child master the concept of acid base worksheet.
