Double Replacement

Presentation

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Science

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9th - 12th Grade

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Practice Problem

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Medium

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NGSS

HS-PS1-4, HS-PS1-5

Standards-aligned

Madalyn Hedges

Used 40+ times

FREE Resource

14 Slides • 8 Questions

Reactions Review

Review on different types of reaction

Combustion
Single Replacement
Synthesis
Double Replacement

Combustion Reactions

React with oxygen
Produce water and carbon dioxide
Usually produce light or heat (Fire, explosions)

Single Replacement reactions

a reaction in which one element is substituted for another element in a compound
One element trades places with another element

Synthesis Reactions

Two or more elements form a product
New product is formed

Multiple Choice

Which of the following is a single replacement reaction?

2 S + 3 O₂ ---------> 2 SO₃

2K + 2H₂O → 2KOH + H

CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(g)

H2SO4 + BaCl2 → HCl + BaSO4

Multiple Choice

Which of the following is a combustion reaction?

2 S + 3 O₂ ---------> 2 SO₃

2K + 2H₂O → 2KOH + H

CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(g)

H2SO4 + BaCl2 → HCl + BaSO4

Multiple Choice

Which of the following is a synthesis reaction?

2 S + 3 O₂ ---> 2 SO₃

2K + 2H₂O → 2KOH + H

CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(g)

H2SO4 + BaCl2 → HCl + BaSO4

What is a double replacement reaction?

In double replacement reactions, elements “swap” places with other elements to form new compound
Two compounds react to form two new compounds.

Multiple Choice

Let's look at this reaction
$H_2SO_4+BaCl_2$ ----> ?

Which side of the equation are the reactants?

Left

Right

H₂SO₄ + BaCl₂ ----> ???

In double replacement reactions, elements trade places to form new products. Sometimes they form what is called a precipitate

Multiple Choice

What is a precipitate?

The left side of the chemical equation

The solid product of a reaction

A solution

What kind of reaction it is

H₂SO₄ + BaCl₂----> ???

So, what would this reaction look like once the reaction takes place?
Will a precipitate form?

Fill in the Blanks

What would be the products once the reaction takes place?

H2SO4 + BaCl2 → ????

Type answer...

$H_2SO_4+BaCl_2→HCl+BaSO_4$

HCl and BaSO4 are the products! But does it form a precipitate?

Using the solubility chart, does a precipitate form?

$H_2SO_4+BaCl_2→HCl+BaSO_4$

Your turn! Look at the following reaction and predict the precipitate

AgNO3 + KCl → AgCl + KNO3

H2SO4+BaCl2→HCl+BaSO4

Multiple Choice

$H_2SO_4+BaCl_2→HCl+BaSO_4$ Does a precipitate form?

Yes

Precipitates are marked as (s) for solid. This shows that Silver Chloride (AgCl) is solid once the reaction takes place.

AgNO₃(aq) + KCl (aq) → AgCl (s) + KNO₃(aq)

When compounds are soluble or dissolved in water, then they are aqueous (aq)

AgNO₃(aq) + KCl (aq) → AgCl (s) + KNO₃(aq)

Multiple Choice

What are aqeous solutions?

A soluble compound dissolved in water

A gaseous form of matter

The product of a reaction

EXIT TICKET!

Reactions Review

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