Intro to Rxn's

Vocabulary

100

Substance used to start a reaction

Reactant

200

Substance that dissolves another substance.

Solvent

300

Number written before a chemical formula

Coefficient

400

What type of ionic equation is this? 

NaCl (aq) + H⁺ (g) + KO (aq) -> NaO (s) + KCl (aq) + H⁺

Complete ionic equation 

500

Point out the precipitate(s) in the following reaction:

NaO (aq) + KCl (s) -> NaCl (aq) + K₂O (s)

K₂O 

Skeleton Equations

100

Knowing about how to predict reactants, especially with metals -- why do you think toothpaste (fluoride) is good at cleaning silverware which is mostly silver sulfide?

Because sulfide would swap places with fluoride therefore cleaning it.

200

In the following skeleton equation, which of the following are spectator ions?

3H⁺ + PO₄^3- + 3Li⁺ + 3OH^- ->  3 H₂O + PO₄^3- + 3Li⁺ 

PO₄^3- + 3Li⁺ 

300

Write the equation AND balance it.

Hydrochloric acid _(aq) + Magnesium _(s) -> Magnesium chloride _(s) + hydrogen gas

2 HCl _(aq) + Mg _(s) -> MgCl_2 (s) + H_{2 (g)}

400

iron (II) chloride (aq) + ammonium hydroxide (aq) -> iron (II) hydroxide (s) + ammonium chloride (aq)

FeCl_{2 (aq)} + NH₄OH _(aq) -> Fe(OH)_{2 (s)} + NH₄Cl _(aq)

500

Write the equation and give the type of rxn:

Sulfuric Acid (aq) + lithium hydroxide (aq) -> water (l) + lithium sulfate (aq)

H₂SO₄ (aq) + LiOH (aq) -> H₂O (l) + Li₂SO₄

Double Replacement

Types of Reactions

100

Mg⁺ + SO₄​^-​​​   -> MgSO₄

Synthesis

200

Li₂O + CoBr -> LiBr + Co₂O

Double Replacement

300

C₆H₁₂O₆ -> H₂O + CO₂

Decomposition

400

C₆H₁₂O₆ + O₂ -> H₂O + CO₂

Combustion

500

Predict the following products of the following reaction.

AgNO₃ + PbSO₄ -> ___________ + _____________

AgNO₃ + PbSO₄ -> AgSO₄ + PbNO₃

Balancing

100

Why do you have to balance all chemical equations?

Because the Law of Conservation of Mass states that the mass you have on the reactants side is the mass you have on the products side.

200

We can change ___________ to balance an equation, but we can never change ____________ to balance an equation.

coefficients, subscripts

300

___Ni₂O₃ _> __Ni + __O2

2 Ni₂O₃ -> 4 Ni + 3 O₂

400

Write a balanced reaction for solid potassium and liquid water coming together to form solid potassium hydroxide and hydrogen gas.

2 K _(s) +2 H₂O _(l) -> 2 KOH _(s) + H_{2 (g)}

500

What would be the products of a reaction between the reactants silver (II) nitrate and sodium chloride? Ensure the reaction is balanced.

AgNO₃ + 2 NaCl -> AgCl₂ + Na₂NO₃

Random

100

What are some ways to tell if a chemical reaction has occured or not?

Fire, bubbles, color or odor change, heat change, explosion, etc.

200

The general form for a single replacement reaction is:

Element + compound -> element + compound

300

solids, gases, liquids, aqueous solutions, and crystals can be created in a chemical reaction. How do we denote an aqueous solution or crystal has been created?

aq and cr

400

Which is a more reactive metal: Mg or Cu?

Magnesium as it's further to the left on the PT

500

Explain why the following isn't balanced and fix it.

Sc₂O₃ + 3H₂O -> 2ScOH₃

Sc₂O₃ + 3H₂O -> 2Sc(OH)₃