Balancing Equations
Solubility
Bonding
Miscellaneous
100

What is a coefficient?

A coefficient is a number that can be placed in front of atoms or molecules in a chemical reaction in order to balance the reactants and products.

100

True or false: nonpolar compounds can dissolve in water.

False

100

Why do atoms bond?

Atoms bond to become stable.

100

What does polar mean?

Something that is polar has two oppositely charged sides.

200

Why do we balance equations?

We need to make sure that the amount of matter going into a reaction is the same amount that comes out.

200

Draw a water molecule with partial charges.

200

What is an ionic bond?

Ionic bonds are the attractive forces shared between atoms when they give or take away electrons.

200

How are electronegativity and polarity related?

Higher electronegativity indicates higher polarity in a bond.

300

Is this equation balanced? Fe + O2 → Fe3O4

No

300

What does insoluble mean?

Something that is insoluble cannot be dissolved in water.

300

Which two periodic trends help determine if an atom is a good replacement for another?

Number of valence electrons and electronegativity.

300

What is an ion? What is ionization?

An ion is a charged particle. Ionization is the process by which neutral particles become charged, by gaining or losing electrons.

400

Is this equation balanced? CH4 + 4Cl2 → CCl4 + 4HCl

Yes

400

How does water dissolve ionic compounds?

Multiple water molecules surround one ion at a time, with their oppositely charged sides facing the ion, then they pull the ions apart, separating their bonds with each other.

400

What happens to the electrons in a covalent bond? What happens to the electrons in an ionic bond?

Covalent- electrons are shared between atoms

Ionic- the nonmetal atom will take electrons from the metal atom

400

What is the E.D. for an Na--O bond and what type of bond is it?

The E.D. is 2.51 and it is an ionic bond.

500

Identify AND count the reactants and products in this reaction: 6CO2 + 6H2O + light → C6H12O6 + 6O2


Reactants: 6 C, 18 O, and 12 H

Products: 6 C, 18 O, and 12 H

500

Why does 1 magnesium (Mg) atom create an ionic bond with 2 chlorine (Cl) atoms to create MgCl2?

The Mg ion has a +2 charge, so it gives away two electrons. Cl has a -1 charge so it can take one electron. Mg has to bond with two Cl atoms in order to give away both of its electrons.
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