Warm Up Warm Up 10-30-1510-30-151. Write the name for these compounds:1. Write the name for these compounds:

(NH(NH44)F )F AgOAgO

2. Write the chemical formula for these 2. Write the chemical formula for these compounds:compounds:

Magnesium bromide Copper (III) chlorideMagnesium bromide Copper (III) chloride

Agenda-Notes Unit 5-1-Demo Gummi Bear-WS Test Review

HomeworkOnline HW tonightNov 3 - Test and Notebook

Unit 5-1Unit 5-1Chemical Reactions Chemical Reactions

Chemical ReactionsChemical Reactions

When one or more When one or more substance changes substance changes into different into different substances.substances.

Always involve Always involve change of energychange of energy

Evidence of Chemical ReactionsEvidence of Chemical Reactions

1.1. change in temperature change in temperature (exothermic or (exothermic or endothermic)endothermic)

2.2. Precipitate (forming a Precipitate (forming a insoluble solid)insoluble solid)

3.3. Change in colorChange in color

4.4. Produce gasProduce gas

Evidence of Chemical ReactionsEvidence of Chemical Reactions

5.5. Release energy as lightRelease energy as light

6.6. Produce SoundProduce Sound

7.7. Change in odorChange in odor

8.8. Absorption or release of Absorption or release of electrical energyelectrical energy

Writing Chemical EquationsWriting Chemical Equations

The arrow is read as “yields” or The arrow is read as “yields” or “produces”“produces”

Coefficients Subscripts

Examples of chemical equationsExamples of chemical equations

Do not place bleach and Do not place bleach and ammonia next to each otherammonia next to each other

Writing Chemical EquationsWriting Chemical Equations

Equations can be written with Equations can be written with wordswords or with or with formula (symbols)formula (symbols)

-Word Form-Word Form: Sodium combine with chlorine gas : Sodium combine with chlorine gas produces sodium chlorideproduces sodium chloride

-Chemical Formula-Chemical Formula: : 2Na2Na(s) (s) + Cl + Cl2 (g) 2 (g) →→ 2NaCl 2NaCl (s) (s)

Check-InCheck-In

Write the chemical equation of this statement.Write the chemical equation of this statement.

Iron reacts with oxygen in the air to produce Iron reacts with oxygen in the air to produce rust (iron (III) oxide)rust (iron (III) oxide)

Other Information in Other Information in EquationsEquations

(s) means solid(s) means solid (l) means liquid(l) means liquid (g) means gas(g) means gas (aq) means aqueous (dissolved in water)-also (aq) means aqueous (dissolved in water)-also

called a called a “solution” “solution” ∆ ∆ (above the arrow) means heat is added(above the arrow) means heat is added ⇌ ⇌ represents that the reaction can happen in represents that the reaction can happen in

both directionsboth directions

SummarySummary WS Test ReviewWS Test Review

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