Vocabulary
A chemical reaction is __________ atoms
Rearranging
How many moles of H2O are in the following reaction:
2 H2(g) + 1 O2(g) → 2 H2O(ℓ)
2
Balance the following equation:
__ H2(g) + __ O2(g) → __ H2O(ℓ)
2 H2(g) + 1 O2(g) → 2 H2O(ℓ)
Given the following reaction, How many moles of oxygen are needed to react with 20.0 moles of H2?
2 H2(g) + 1 O2(g) → 2 H2O(ℓ)
10.0 moles
A ___________ is a substance or compound added to a system to cause a chemical reaction or to test whether a reaction occurs
Reagent
_______ cannot be created or destroyed. All _______ present in the reactants must be accounted for in the products (answer is the same word).
Atoms
How many moles of CO2 are in the following reaction:
𝐶2𝐻6(𝑔) + 𝑂2(𝑔) → 𝐶𝑂2(𝑔) + 𝐻2𝑂(𝑔)
1
Balance the following reaction:
__ 𝐶2𝐻6(𝑔) + __ 𝑂2(𝑔) → __ 𝐶𝑂2(𝑔) + __ 𝐻2𝑂(𝑔)
2 𝐶2𝐻6(𝑔) + 14 𝑂2(𝑔) → 4 𝐶𝑂2(𝑔) + 6 𝐻2𝑂(𝑔)
Given the following reaction, How many moles of water will be produced if we use 20.0 moles of H2?
2 H2(g) + 1 O2(g) → 2 H2O(ℓ)
20.0 moles
_______ __________ is the substance that is completely used up first in a chemical reaction, which stops the reaction from continuing and limits the amount of product made
Limiting reagent
After you write the coefficient and the element/compound, you must include the ______ _______ in parenthesis in a chemical reaction.
Physical State
How many moles are sodium are in the following reaction:
2 𝑁𝑎𝐵𝐻4 𝑠 + 4 𝐻2𝑂 ℓ → 2 𝑁𝑎𝐵𝑂2 𝑎𝑞 + 8 𝐻2 𝑔
4
Balance the following reaction:
__ 𝐹𝑒2𝑃 𝑠 + __ 𝑆(𝑠) → __ 𝑃4𝑆10 𝑠 + __ 𝐹𝑒𝑆 𝑠
4 𝐹𝑒2𝑃 𝑠 + 18 𝑆(𝑠) → 𝑃4𝑆10 𝑠 + 8 𝐹𝑒𝑆 𝑠
Given the following reaction, how many moles of Iron Sulfide will be produced if you start with 15 moles of Iron Phosphide?
4 𝐹𝑒2𝑃 𝑠 + 18 𝑆(𝑠) → 𝑃4𝑆10 𝑠 + 8 𝐹𝑒𝑆 𝑠
30 moles
Experimental errors by lab personnel contribute to the decrease of the amount of final product obtained. What is the actual yield divided by the theoretical yield called?
Percent Yield
The stoichiometric coefficients in a chemical reaction tell us the _______ ________ for the reagents and how much product will be produced
Mole Ratio
How many moles of Iron are in the following reaction:
4 𝐹𝑒2𝑃 𝑠 + 18 𝑆(𝑠) → 𝑃4𝑆10 𝑠 + 8 𝐹𝑒𝑆 𝑠
12
Balance the following reaction:
__ 𝑁𝑎𝐵𝐻4 𝑠 + __ 𝐻2𝑂 ℓ → __ 𝑁𝑎𝐵𝑂2 𝑎𝑞 + __ 𝐻2 𝑔
2 𝑁𝑎𝐵𝐻4 𝑠 + 4 𝐻2𝑂 ℓ → 2 𝑁𝑎𝐵𝑂2 𝑎𝑞 + 8 𝐻2 𝑔
Given the following reaction, what is the mass of water that will be produced if 7.07 g of H2 is used?
H2 = 2.02 g/mol and H2O = 18.02 g/mol.
2 H2(g) + 1 O2(g) → 2 H2O(ℓ)
63.1 g of Water (63.07g before accounting for sig figs)
Consider the reaction 4 Al(s) + 3 O2(g) --> 2 Al2O3(s).
If you mix 1.00 mole of aluminum with 1.50 moles of oxygen, which substance is the limiting reactant?
Aluminum
The _________ ____________ in the chemical reaction will tell us the proportion between the reactants and how much product is formed
Stoichiometric coefficients
How many moles of Oxygen are there in the following reaction:
3 𝐶𝑎(𝑂𝐻)2 𝑎𝑞 + 2 𝐻3𝑃𝑂4 𝑎𝑞 → 𝐶𝑎3(𝑃𝑂4)2 𝑠 + 6 𝐻2𝑂(l)
14
Balance the following reaction:
__ 𝐶𝑎(𝑂𝐻)2 𝑎𝑞 + __ 𝐻3𝑃𝑂4 𝑎𝑞 → __ 𝐶𝑎3(𝑃𝑂4)2 𝑠 + __ 𝐻2𝑂(l)
3 𝐶𝑎(𝑂𝐻)2 𝑎𝑞 + 2 𝐻3𝑃𝑂4 𝑎𝑞 → 𝐶𝑎3(𝑃𝑂4)2 𝑠 + 6 𝐻2𝑂(l)
Given the following reaction, what is the mass of water that will be produced if 12.3 g of O2 is used?
O2 = 31.998 g/mol and H2O = 18.02 g/mol.
2 𝐶2𝐻6(𝑔) + 14 𝑂2(𝑔) → 4 𝐶𝑂2(𝑔) + 6 𝐻2𝑂(𝑔)
2.97 g
In the reaction 2 Na(s) + Cl2(g) --> 2 NaCl, 4.60 g of sodium reacts with 3.55 g of chlorine gas.
What mass of sodium chloride is produced?
Molar masses: Na = 23.0 g/mol, Cl2 = 71.0 g/mol, NaCl = 58.44 g/mol
5.84 g NaCl