Select the correct answer. What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent? A. combustion B. decomposition C. single replacement D. synthesis

Question

Please answer the following questions?

Drag the tiles to the correct boxes to complete the pairs.

Identify the type of chemical reaction that is described.

neutralization

combustion

synthesis

decomposition

Water breaks down into

hydrogen and oxygen.

arrowRight

Leaves make starch using

chlorophyll and carbon dioxide.

arrowRight

Food burns in oxygen gas

and releases a lot of energy.

arrowRight

Adding vinegar (acid) to

baking soda (alkali) gives

a product that is neither

acidic nor alkaline.

arrowRight

Iron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this?

A.

combustion

B.

decomposition

C.

replacement

D.

synthesis

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Match the reactants with the products.

zinc sulfate + copper

copper sulfate + oxygen

copper + water

aluminum chloride + copper

copper oxide

copper oxide + hydrogen

arrowRight

copper sulfate + zinc

arrowRight

copper + oxygen

arrowRight

aluminum + copper chloride

arrowRight

Select the correct answer.

What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent?

A.

combustion

B.

decomposition

C.

single replacement

D.

synthesis

Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears. Samuel takes a sip to discover that the water tastes salty. What kind of change has occurred?

A.

It’s a chemical reaction because a new substance has formed.

B.

It’s a physical change because the water and the salt kept their original properties.

C.

It’s an example of synthesis because two substances reacted to give one substance.

D.

It’s a chemical reaction because the water now tastes salty but originally did not.

Answer 1

Combustion Reactions have the same products regardless of the Carbon compound -->

C_xH_y + O₂ --> CO₂ + H₂O

2 C₂H₆ + 7 O₂ --> 4 CO₂ + 6 H₂O

KEY Words - burns

Synthesis reactions have two reactants and one product (sometimes called COMBINATION reactions) -->

A + B --> AB

C + O₂ --> CO₂

2 Na + Cl₂ --> 2 NaCl

KEY WORDS - Combines, becomes, makes

Decomposition are the opposite of synthesis - one reactant breaks down into 2 products -->

AB --> A + B

2 KClO₃ --> 2 KCl + 3 O₂

KEY WORDS - Breaks down, decomposes

Single Replacement

A + BC --> AC + B

Cu + 2 AgNO₃ --> 2 Ag + Cu(NO₃)₂

Look for - single element in the work problem or the equation,

i.e Iron oxide reacts with aluminum - Iron oxide is a compound, Aluminum is a single element

Double Replacement

AB + CD --> AD + BC

KI + PbNO₃ --> KNO₃ + PI

A 5th type of reaction is NEUTRALIZATION - which occurs commonly when an acid mixes with a base to form water and a salt, leaving behind products that are neither acidic nor basic.

Match the reactants with the products.

zinc sulfate + copper --> SINGLE REPLACEMENT, Copper and Zinc switch spots

copper sulfate + oxygen --> NO REACTION

copper + water --> SINGLE REPLACEMENT, Copper switches with the Hydrogen ion found in Water (H2O)

aluminum chloride + copper --> SINGLE REPLACEMENT, Copper and Aluminum switch spots

copper oxide --> DECOMPOSITION, breaks down into copper ion and oxygen gas

Water + Salt --> Salt will just dissolve in water and no chemical reaction occurs, because water molecule is very polar and it pull outs the sodium and chlorine ions and when its fully dissolve the water and salt solution will full of sodium and chlorine ions.