Acids and bases

Acids and bases

Properties and the PH scale

Acids

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• Acids release H⁺ (protons) in solutions.

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• HCL > H⁺ + Cl^-

​H+

Properties

• ​Sour taste

• Conducts electricity

• Reacts with metals (corrosive)

• Turns blue litmus paper re​d

Ph scale

• ​All acids have a ph of 0-6

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Multiple Choice

Which of the following is an acid ?

• Shampoo

• Baking soda

• Orange juice

• Water

Multiple Choice

An acid is a solution that contains __________ ions dissolved in water.

• positive

• negative

Multiple Choice

When dissolved in water, acids produce:

• bases

• salts

• hydrogen ions

• hydroxide ions

Multiple Choice

Turns litmus red

• Acids

• Bases

• All

Multiple Choice

Which has a pH below 7?

• Acid

• Base

Multiple Choice

Tastes Sour

• Acids

• All

• Bases

• Salts

Bases

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OH^-

Properties

• Bitter t​aste

• Can conduct electricity

• Slippery

• Reacts with acids

• Turns red litmus paper blue​

• Bases release OH^- in solutions.

  ​

• NaOH > Na⁺ + OH^-

ph scale

• All bases have a ph of 8-14

Multiple Choice

Bases have a pH of _______________.

• below 7

• above 7

• exactly 7

Multiple Choice

What ions are there more of in basic solutions?

• H+ (H3O+)

• OH-

Multiple Choice

Which one of the following is NOT a property of basic solutions?

• Feels soapy/slippery

• Tastes sour

• Conducts electricity

• Turns red litmus paper blue

Multiple Choice

All bases have a sour taste.

• True

• False

Multiple Choice

Which of the following statements is correct?

• Blue litmus paper turns red when placed in a base.
• Red litmus paper turns blue when placed in a base.
• Blue litmus paper stays blue when placed in an acid.
• Red litmus paper stays red when placed in a base.

The pH scale measures how acidic or basic a substance is

We use the numbers 0-14 to indicate if it is an acid or base and how strong the substance is.

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Acids: 0-6.

The lower the number the stronger the acid.

Bases: 8-14.

The higher the number, the stronger the base.​

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A pH of 7 means it is neutral.​

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The ph scale

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Multiple Choice

Which is the stronger acids ?

• pH 1

• pH 8

• pH 13

• pH 7

Multiple Choice

Value from 0-14 that determine the acidity of a solution

• pH scale

• Base

• Number line

• Acid

Multiple Choice

Pure water has a pH of 7

• is a base

• is a neutral substance

• is an acid

• could be either an acid or a base

Multiple Choice

What is the range of pH values in an acidic solution?

• pH = 7

• 7-14

• 0-7

• 0-14

Multiple Choice

Bases have a pH of _______________.

• below 7

• above 7

• exactly 7

Multiple Choice

Neutral solutions have a pH of _______________.

• below 7

• above 7

• exactly 7

Multiple Choice

Which one of the following is NOT a property of acids.

• Tastes sour

• Corrodes metals

• Conduct electricity

• Turns red litmus paper blue

Multiple Choice

Which one of these substances will have a NEUTRAL pH?

• Lemon juice

• Coffee

• Bleach

• Water

Multiple Choice

Is the following substance an acid or a base? Ca(OH)2

• Acid

• Base

Multiple Choice

Is the following substance an acid or a base? HCl

• Acid

• Base

Multiple Choice

Is the following substance an acid or a base? H2(SO4)

• Acid

• Base

Multiple Choice

Is the following substance an acid or a base? KOH

• Acid

• Base

Multiple Choice

Which of the following values would represent the pH of a strong base?

• 1

• 8

• 7

• 13

Multiple Choice

Complete the definition below:

Acids are....

• hydrogen donors.

• hydrogen acceptors.

• proton donors.

• proton acceptors.

Multiple Choice

A substance has a pH value of 8. It is most likely to be what?

• Strong acid

• Weak acid

• Strong base

• Weak base

Multiple Choice

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Multiple Choice

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base

Multiple Choice

Ammonia has a pH of 12.  Ammonia is __________.

• an acid
• a base
• an element
• a metal

Multiple Choice

When dissolved in water, bases produce:

• acids
• salts
• hydrogen ions
• hydroxide ions