Covalent/Ionic
Identify if the following are covalent or ionic
- NaNO3
- CO2
-BaBr2
- NaNO3 - Ionic
- CO2 - Covalent
- BaBr2 - Ionic
What happens to the volume of a gas if the temperature is increased?
Increases
Identify the type of reaction:
A + B --> C
Synthesis
Define Limiting Reactant
The reactant that "runs out" first
If you mix 5.5 moles with 3 L of water, what is the molarity of the solution?
1.83 M
What is the correct balanced formula when aluminum and sulfur form an ionic compound?
Al2S3
What happens to pressure of a gas when volume decreases?
Increases
Balance the following equation:
___ H2O (l) → ___ H2 (g) + ___ O2 (g)
2 H2O (l) → 2 H2 (g) + 1 O2 (g)
4 Fe (s) + 3 O2 (g) → 2 Fe2O3 (s) + heat
If 4 moles of iron react with excess oxygen, how many moles of Fe2O3 forms?
2 moles
Explain 2 ways to make a solution more concentrated
Add solute, remove solvent
A positively charged ion
What variable(s) are held constant in Avogadro's Law?
Pressure and Temperature
Identify the type of reaction:
2 NaBr + CaF2 → CaBr2 + 2 NaF
Double replacement
If 6 moles of H2O are produced in a reaction, how many grams is this?
108 grams
An acid is a solution that has a pH of _______
A base is a solution that has a pH of ________
An acid is a solution that has a pH of less than 7
A base is a solution that has a pH of more than 7
Halogens have ___ valence electrons, therefore form _____ (positive/negative) ions by ______ (gaining/losing) ______ (#) electrons.
Halogens have 7 valence electrons, therefore form negative ions by gaining 1 electrons.
A rigid container of oxygen gas has a pressure of 1.80 atm at a temperature of 351 K. What is the pressure at 193 K?
0.988 atm
Balance the following equation:
___ C2H5OH (l) + ___O2 (g) → ___ CO2 (g)+ ___H2O (g)
2 C2H5OH (l) + 7 (g) → 4 CO2 (g)+ 6 H2O (g)
How many moles if 230 grams of NaOH?
5.75 moles
You wish to dilute a 3 L of a 7 M solution of HCl to 1.5 M concentration. What is the final volume of solution needed?
14L
Covalent - 2 or more nonmetals that SHARE electrons
Ionic - metal and a nonmetal that TRANSFER electrons
You are studying a 2 moles of N2 gas at 273K. If the pressure of this gas is 2.5 atm, what is the volume in L?
17.9 L
If lithium is the most reactive element, will the following reaction occur? Explain.
Na (s) + LiCl --> ?
No, the single element must be more reactive that the element its replacing in the compound. Na is not more reactive that lithium, so no reaction.
You start this reaction with 10 moles of N2 and 24 moles of O2. Use a BCA table to determine how many moles of N2O5 will form.
2 N2 + 5 O2 ⟶ 2 N2O5
9.6 moles
19.2 g of HNO3 are used to form a solution with a volume of 0.50 L. What is the molarity?
0.6M