Grade 7: Acid and Bases Litmus Paper .pptx

Very Fun and interactive

5. WHAT DOES IT TASTE

D

LIKE?

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4 Baking soda

1

6. ADATU
が PLITI |

7. BASE

_ ACID

Baking soda

8. + Define acid and base
ㆍ Describe the physical and chemical mate
and bases
» Use Ph scale to measure the acid / base level of
material
・ Explaif ¿Ne uses of acid and = 8
e

な

9. Properties of

ACID

+ Are substances that tast sour.
+ Latin word “acidus” (means sour)

Ex. Grapes, Coffee, Vinegar,
Oranges and ete.

* Not all acid taste sour, the
sourness can vary in different acid.

10. + Contains Hydrogen ions (H+)
that they release when dissolved in
water.

+ Turns litmus paper red/pink.

11. Properties of

BASE

+ Are substances that tast bitter.

+ Also known as alkaline.

* When added to water give foam
and feel slippery to the touch.

Ex. Ditergent, shampoo, baking
soda and etc.

12. ・ Contains Hydroxide ions (OH-)
that they release when dissolved in y
water.

* Turns litmus paper Blue.

13. TasteSour | Taste Bitter |
Do not feel slippery | Feel slippery and

Soapy
Release Hydrogen | Release Hydroxide
(H+) ions in (OH-) ions in

aqueous solution | aqueous solution
Turns Litmus paper | Turns Litmus paper
red/pink Blue

14. /

What will happen if we combined an acid
and a base?

Ÿ

15. Salt + Water 「
« There will be a reaction happen called 엘
"neutralization reaction.” .

* Resulting in the formation of water and salt... 6

16. ( Acid base neutralization reaction

Sodium Chloride
NaCl H,0

Hydrogen Chloride Sodium Hydroxide
¡ HCl NaOH

~

DewWool.com

17. iy The pH scale

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

| ne
ㅣ 베 메

ta n 0” alkaline
de

18. Pouvior Hydrogen (pH

¢ The pH scale was invented
in 1909 by Danish
biochemist Soren Sorensen.
・ The pH comes from the
french word means “The
power of hydrogen.”

19. The pH scale

o 1 2 3 4 5 6 7 S 9 10 11 12 13 14

Sa ae |

acidic neutral alkaline

* Based on the Figure, what does the range
from 0 - 14 indicate?

・ What does pH that is less than 7 indicate?
・ What does pH that is greater than 7
indicate?

20. The pH scale

o 1 = 3% S 6 7 8&8 9 10 11 12 13 14

a |

acidic neutral alkaline

1. Which one between gastric juice that has
3.5 pH and tomato with the pH of 4.6 is
more acidic?

2. Which one between an ammonia solution
with a pH of 11.5 and a solution of baking
soda with a pH of 8.3 is more basic? Why?"

21. D “Se

22. The pH scale

o 1 = 2. S 6 7 8&8 9 10 11 12 13 14

er

acidic neutral alkaline
1, Which one between a solution of bleach with a pH of
12.5 and a solution of milk of magnesia with a pH of
10.5 is more basic?

2, Comparing a solution of lemon juice with a pH of 2.3
and a solution of vinegar with a pH of 2.8, which one is
more acidic?

23. The pH scale

o 1 2 3 4 5 6 7 8 9 10 11 12 13 14

a
acidic neutral alkaline

3. Comparing a solution of household ammonia with a

pH of 11.0 and a solution of sea water with a pH of 8.0,

which one is more basic?

4. Between a solution of hydrochloric acid with a pH of
1.0 and a solution of orange juice with a pH of 3.5,
which one is more acidic? Why?

24. The pH scale

o 1 2 3 4 S 6 7 S 9 10 1 12 13 14

ee ee

acidic neutral alkaline

5. Considering a solution of sulfuric acid with a pH of
0.5 and a solution of black coffee with a pH of 5.0,
which one is more acidic? Why?

25. Direction: Answer the following on in a 1/2 sheet
of paper.

1.Comparing a solution of stomach acid with a pH of 1.5
and a solution of apple juice with a pH of 3.0, which one
is more acidic?

2. Between a solution of vinegar with a pH of 2.8 and a
solution of tomato juice with a pH of 4.2, which one is
more acidic?

26. 3. Comparing a solution of antacid with a pH of 10.0 and |
a solution of seawater with a pH of 8.1, which one is
more basic?

4, With a pH of 6.8, is the substance likely to be an acid
or a base?

5. If a solution has a pH of 8.5, would you classify it as
an acid or a base?.

27. I fi

** ASSIGNMENT =
Direction: Advance study about Acid and Base Ë
indicator (p.98-102) and in a Y4 sheet of paper, ©
answer the folowing; u

1. What is a pH Indicator

& Prepare an example of indicators minimum
of 5

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28. PROPERTIESOFACIDSAND 4
BASES €

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eto. .
ee cs
|
BASES

~ Their aqueous solutions are electrolytes 位 os si my OM88 9
_ They conduct an electrical current 은 ules ghar pane ‘a

Acid change the color of certain acid- indi ;

"Acide react with active metals Bases do not react with metals in the

A way that acids do

29. TYPES OF SOLUTIONS » .

ns

HYPOTONIC ISOTONIC

Mercury is the closest Venus has a beautiful Despite being red, Mars is
planet to the Sun and the name and is the second actually a cold place. It's
smallest of them all planet from the Sun full of iron oxide dust

AA 6

30. ACID PROPERTIES

) O» Venus is the second 0“ As,

planet from the Sun planet ofthem all

O em Bessie haga (OF METAL, sen
Mars is a cold place and has several rings
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31. OTHER TYPES OF SOLUTIONS

ALLOY

COLLOID

Mercury is the closest Venus is the second

planet to the Sun planet from the Sun ns
| e PL

SOLUTE EMULSION @

Jupiter is the biggest ne 으라

planet of them all

Saturn is the planet on is the farthest le
with rings planet from the Sun

32. Oo 이
0

“This is a quote, words full of wisdom
that someone important said and can
make the reader get inspired.”

34. Images reveal large amounts of data, so
remember: use an image instead of a long
text. Your audience will appreciate it

35. WHAT ABOUT

Solubility does not indicate how quickly a sul will dissolve; rather, it
indicates how much of a substance will dissolve at a particular temperature.
Some solutes dissolve quickly, whereas others take much longer. When a
solution is agitated or shaken, or when the temperature of the solution is
raised, a solute dissolves more quickly

36. HOW MUCH WILL DISSOLVE? 이

‥… e
0

When the SOLUTIONS

solutes, such as sodium chloride and calcium

carbonate, do not become more soluble い
要 IGN | ソ

a o
(か た In contrast to liquid-solid solutions, the
solubility of a gas in a liquid-gas solution
. diminishes as temperature rises

mn Ju *

39. You can enter a subtitle here if you need it 0

40. ACTIVITY 1 Es

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This aids in lowering the amount of acids in foods: ®
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41. ACTIVITY 1 by

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This aids in lowering the amount of acids in foods: 0
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42. d A J EN

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ACTIVITV 9 ーー = y
AGIIV | | 1 〆 Ad 6

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SOLUTE SOLVENT = SOLUTION |

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Gas Liquid Whipped cream

Liquid Liquid Mayonnaise

Liquid Solid Gelatin

Solid Solid Cranberry glass

Solid Gas SEE THES
ANSWERS 一

43. You can replace the image on the screen
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"Replace image"
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