Bonding & IMFs
What type of bond occurs between 2 nonmetal atoms with an electronegativity difference of 0.2?
nonpolar covalent
What is one indication that a chemical reaction has occurred?
bubbles, temperature change, color change, light, precipitate
How many particles are in 1 mole of substance?
6.022 x 1023
salad, trail mix, etc.
What pH range indicates an acidic solution?
<7
What term describes a molecule with an uneven distribution of electrons?
polar
What type of reaction involves a hydrocarbon reacting with oxygen to produce carbon dioxide and water vapor?
combustion
What do we call the reactant that is used up first in a reaction?
Limiting reactant
Food dye is dissolved in alcohol. What is the solute?
Food dye
In the reaction HNO₂ + NH₃ → NO₂⁻ + NH₄⁺, which species is the base?
NH3
What happens to bond angles as the number of lone pairs on the central atom increases?
bond angles decrease
What type of reaction involves two ionic compounds exchanging ions in an aqueous solution?
Double replacement
What is the percent composition of H2S?
5.92% H
94.08% S
What term describes two liquids that can mix evenly in all proportions?
miscible
Give the formula for a strong acid.
H2SO4, HI, HBr, HNO3, HCl, HClO4
What is the strongest type of intermolecular force (IMF)?
Hydrogen bonding
What is the term for the solid substance that may form when two aqueous solutions react?
precipitate
If 10.5 g of MgCl2 was produced en 13.2 g was expected , what is the percent yield AND what error could have happened?
79.5%
lost product, used less reactant than recorded, incomplete reaction
What is one thing that will increase the solubility of a gas in water?
Increasing the pressure
Decreasing the temperature
What is the name of HC2H3O2?
Acetic acid
Why do ionic compound conduct electricity when dissolved but covalent compounds do not?
Ionic bonds break creating ions; covalent bonds do not. There must be charged particles able to move around in order to conduct electricity.
Complete and balance the equation. Include states of matter for the products.
Na3PO4 (aq) + CaCl2 --> _____________________
2 Na3PO4 (aq) + 3 CaCl2 -->
6 NaCl (aq) + Ca3(PO4)2
What is the volume (in L) of a 1.5 M CaCl₂ solution prepared with 36.0 g of solute?
0.22 L
How much 15 M HCl (in mL) is needed to prepare 1.0 L of 0.10 M HCl?
6.7 L
Give a conjugate acid-base pair from the reaction below:
HCl + H2O --> Cl- + H3O+
HCl & Cl-
H2O & H3O+