Chemical Interactions Test Study

Vocab.

100

MgSO₄ + NaCl  --> Na₂SO₄  +  MgCl₂

Label the reactants and the products

MgSO₄ + NaCl      -->      Na₂SO₄  +  MgCl₂

  Reactants                              Products

200

Metals bonded to nonmetals creates what type of bond?  

Ionic Bonds

300

MgSO₄ + 2 NaCl  --> Na₂SO₄  +  MgCl₂

_{a.  What is the 2 in front of NaCl called?}

_{B.  What is the 4 behind the O called?}

a.  What is a Coefficient.

b.  What is a subscript.

400

What types of elements share electrons and what is this type of bond called?

Nonmetals and nonmetals share electrons and this type of bond is called a covalent bond.

500

List the three other possible forms of matter symbols on an equation and how are they identified.  

What state represents dissolved in water?

(s), (l), (g), (aq) - solid, liquid, gas, dissolved in water

and they are identified by placing the symbol in parentheses behind the formulas.

aqueous

Types of Chemical Reactions and how do you know?

100

HgO → Hg + O2

Decomposition because one reactant (HgO) broke down into two products (Hg + O₂)

200

CH₄ + 2 O₂ → CO₂ + 2 H₂O

Combustion because a hydrocarbon (CH₄) reacted with an O₂ to form CO₂ and H₂O

300

P + O₂ → P₄O₁₀

Synthesis because two reactants (P + O₂) combined into one new product (P₄O₁₀₎

400

CuCl₂ + H₂S → CuS + HCl

Double Replacement because the cations Cu and H traded anions Cl and S to make new molecules - CuS and HCl.

500

Fe + CuSO₄ ---> FeSO₄ + Cu and how do you know?

The Fe displaces Cu and makes Cu a lone element while Fe bonds to the SO₄ to create FeSO₄ a new molecule/compound. - one new lone element and one new compound

Balancing Equations

100

Balance the equation:

Cu + O₂ → CuO

2Cu + O₂ → 2CuO

200

Balance the equation:

Sb + I₂ → SbI₃

2Sb + 3I₂  → 2SbI₃

300

Balance the equation:

P₄ + O₂ → P₂O₃

P₄ + 3O₂ → 2P₂O₃

400

Balance the equation:

Fe₂O₃ + C → Fe + CO₂

2Fe₂O₃ + 3C → 4Fe + 3CO₂

500

____ Al₂O₃ + ___ NaCl  -->   ___ AlCl₃   + ___ Na₂O  work backwards to figure out the charges for Al (Aluminum)

1 Al₂O₃ + 6 NaCl  -->  2 AlCl₃   + ₃ Na₂O

Bonds & Compounds

100

What information do you need to write the products for Ca + H₂SO₄ -->

Periodic table that shows the charges of the groups and a polyatomic list  - do you have both of these to use on the test?

200

What is the difference between an ionic and covalent bond?

Covalent bonds are between two nonmetal or metalloid atoms which share valence electrons compared to ionic bonds are between a metal and a nonmetal/metalloid that transfer electrons.

300

a.  Write the correct formula for the product if Li reacts with O.  

b.  Is it ionic or covalent?

Li₂O

Ionic - Metal and nonmetal

400

Possible or not and why?

HNe

Not possible because Ne is a noble gas.

500

Possible or not and why?

MgP

Not possible because charges were not used correctly - Mg⁺² P^-3 would create Mg₃P₂ when the criss-cross method is used.

Misc.

100

MgSO₄ + NaCl  --> Na₂SO₄  +  MgCl₂

How do we read the arrow?

yields or produces

200

LiCl + NaOH -->   

What are the new products if this is a double displacement

HOH + LiCl or H2O + LiCl

because all have a +1 charge so different subscripts are not needed.

300

What is the hardest thing for you in this unit?  Do you know where to find practice?

Answers will vary - most things can be practiced on chemquiz.net

400

Why is it important to balance chemical equations?

Because law of conservation of matter is always preserved - meaning what ever you put in you must get the same elements and # of elements out even if they rearrange.

500

Give an example of a sign of a chemical reaction?

Change in temperature, formation of a gas- bubbles, produces an odor(smell), formation of a solid called a precipitate, change in color