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4301412076

Rizka Nur Yuniarsih

Chemistry Education 3rd Group

CORE

COMPETENCIES

BASIC

COMPETENCIES

INDICATORS

LEARNING

PRODUCTS

MATTER

CC3 : Understanding, applying, analyzing,

conceptual, procedural, based on his

curiosity about science, technology,

arts, culture, and humanities with an

insight into humanity, national, state,

and civilization-related causes of

phenomena and events, as well as

applying procedural knowledge in a

specific field of study according to their

talents and interests to solve the

problem.

CC4 : Processing, reasoning, present, and

create in the realm of the concrete and

abstract domains associated with the

development of the self-learned at

school, and were able to use the

method according to the rules of

science.

CORE

COMPETENCIES

BASIC

COMPETENCIES

INDICATORS

LEARNING

PRODUCTS

MATTER

3.4 Analyze the factors that affect the

corrosion and submit idea/notion to

solve it

4.4 Submit an idea/notion to prevent

and resolve corrosion

Describe factors that affect the

occurrence of corrosion through

experiments

Describe several ways to prevent

corrosion

CORE

COMPETENCIES

BASIC

COMPETENCIES

INDICATORS

LEARNING

PRODUCTS

MATTER

1.Students are able to explain the

factors that affect the occurrence of

corrosion through experiments.

2.Students are able to explain several

way to prevent corrosion.

3.Concept mapping on corrosion and

their relationship with human live.

4.Presentation in power points relevant

to the concept taught.

CORE

COMPETENCIES

BASIC

COMPETENCIES

INDICATORS

LEARNING

PRODUCTS

MATTER

Corrosion is reduction-oxidation reaction

between a metal with other compound present

in the environment (such as water and air)

which produce undesirable compounds.

We know it as formation of rust.

Metal rust generally in the form of oxides or

carbonates.

When iron submerged or in contact with an

electrolyte such as sea water or dew, in the area

of anode, Fe(s) Fe2+(aq) + 2e–

In the cathode, when electron loose in the

electrolyte, then break down into positive and

negative ions, forming O2(g) + 2 H2O(l) + 4e–

4 OH–(l)

Because a cycle then the Hydroxyl ions (OH-)

back to the anode through electrolyte carries

electron.

Iron ion(II) which formed in the anode will be

oxidized to form iron (III) which then form

hydrates oxides compound Fe2O3·xH2O called

rust.

Preventing of corrosion in iron can be done

by these following methods:

a. Coating iron with paint

b. Chromium plating

c. Tin plating

d. Galvanization

e. Sacrificial Anode