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WorksheetsRegents Review 3- Reactions
Total questions: 15
Worksheet time: 8mins
Which of the following concepts is FALSE?
Gram formula mass is the sum of the element masses in a chemical formula.
Molar mass is another term for gram formula mass.
Gram formula mass is the mass of 1 mole of a substance.
The periodic table contains the molar mass for each element in the bottom left corner of each box.
Which of the following chemistry concepts is FALSE?
A chemical equation has reactants on the left side of the arrow.
A chemical equation is balanced when the amount of elements in the reactants is greater than the amount of elements in the products.
Conservation of mass states that the total mass of the reactants must be equal to the total mass of the products.
We put coefficients in front of substances in a chemical equation to balance it.
Which of the following chemistry concepts is FALSE?
Exothermic reactions absorb energy.
Exothermic reactions have energy as a product.
Endothermic reactions have energy as a reactant.
Endothermic reactions means the energy of the products is greater than the energy of the reactants.
Which of the following chemistry concepts is FALSE?
The activation energy is the amount of energy it takes for a reaction to occur.
The heat of reaction is the energy of the reactants minus the energy of the products.
A negative heat of reaction shows an exothermic reaction.
A positive heat of reaction shows an endothermic reaction.
Which of the following chemistry concepts is FALSE?
When a bond breaks, energy needs to be absorbed.
When a bond is formed, energy is released.
An effective collision requires a sufficient amount of energy, but the positioning of particles does not matter.
The more particle collisions there are, the faster the reaction rate.
Which of the following chemistry concepts is FALSE?
Equilibrium occurs when the rate of the forward and reverse reactions are equal.
Equilibrium occurs when the amount of reactants is equal to the amount of products.
Equilibrium occurs when the concentrations of both reactants and products are constant.
Dynamic equilibrium means that the forward and reverse reactions are both occurring simultaneously.
Which of the following chemistry concepts is FALSE?
Increasing the temperature will increase the speed of a chemical reaction.
Increasing the concentration of reactants will speed up a chemical reaction.
Increasing the pressure of gases only will speed up a chemical reaction.
Increasing the surface area of the substances will decrease the speed of a chemical reaction.
Which of the following chemistry concepts is FALSE?
Synthesis reaction is
A + B --> B + A
Decomposition reaction is
AB --> A + B
Single replacement reaction is
AB + C --> CB + A
Double replacement reaction is
AB + CD --> AD + BC
Which of the following chemistry concepts is FALSE?
Molarity is the moles of solution per liter (mol/L).
Parts per million (ppm) is a unit of concentration.
Molarity is a unit of volume.
Titration is the process of determining an unknown concentration of an acid or base.
Which of the following chemistry concepts is FALSE?
An acid is a proton donor.
A base is a proton acceptor.
A base produces hydronium ions.
An acid produces H3O+ ions.
Which of the following chemistry concepts is FALSE?
An acid has a pH value of 7 or lower.
A base has a pH greater than 7.
An acid contains more hydronium ions than hydroxide ions.
A base contains more hydroxide ions than hydronium ions.
Which of the following chemistry concepts is FALSE?
A neutralization reaction starts with an acid and a base.
A neutralization reaction produces water and sand.
A pH of 7 means the amount of hydronium equals the amount of hydroxide.
Electrolytes contain ions like acids, bases or salts.
Which of the following chemistry concepts is FALSE?
A catalyst speeds up the reaction.
A catalyst lowers the activation energy.
A catalyst provides an alternate reaction pathway.
A catalyst results in a lower heat of reaction.
Which of the following chemistry concepts is FALSE? (Need Table M)
An indicator is used to determine the pH or acidity of a substance.
Methyl orange will turn a solution red if it has a pH of 2.
Thymol blue will turn a solution blue if it has a pH of 11.
Bromcresol green will turn a solution blue if it has a pH of 3.
Which of the following chemistry concepts is FALSE?
A pH change from 2 to 4 will increase the amount of hydronium ions by 10.
A pH change from 2 to 4 will decrease the amount of hydronium ions by 100.
A pH change from 4 to 2 will increase the amount of hydronium ions by 100.
A pH change from 4 to 3 will increase the amount of hydronium ions by 10.
