Reaction Review (Spicy): Question Preview (ID: 13397)


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You mix solution A (70 g) with solution B. When they are mixed, a chemical reaction occurs and you end with a total mass of 190 g). What should the mass of solution B be?
a) 70 grams b) 90 grams c) 120 grams d) 190 grams
You did an experiment where you combined a few chemicals and experienced an endothermic reaction. What happened?
a) Mass was lost b) Mass was gained c) Heat/energy was absorbed d) Heat/energy was released
What is the definition of “products” in a chemical reaction?
a) When a reaction releases heat b) When a reaction absorbs heat c) The chemicals that are added to a chemical reaction d) The result of mixing chemicals in a chemical reaction
In chemical reactions atoms are rearranged. John Daltons proposed that the number of each type of atom stays the same. Which idea did Dalton's statement help explain?
a) The law of conservation of energy b) The law of conservation of matter c) The arrangement of protons, neutrons, and electrons in atoms d) The arrangements of atoms in the Periodic Table of the Elements
Which type of reactions absorbs heat from the surroundings?
a) Combustion b) Endothermic c) Exothermic d) Neutralization
A block of iron will react with acid to produce hydrogen gas. Which of these describes what would happen if iron powered were used instead of a block of iron?
a) The reaction would happen at the same speed b) The speed of the reaction would decrease c) The speed of the reaction would increase d) The reaction would no longer take place
Which of these best describes why the pH scale is used to describe how acidic or basic a solution is?
a) The concentration of hydrogen ions is very small b) The concentration of hydrogen ions is very large c) The concentrations of hydrogen ions for different substances are very similar d) The concentrations of hydrogen ions for different substances can be very different
Which of these is measured using the pH scale?
a) The number of hydrogen ions b) The number of hydroxide ions c) The concentration of hydrogen ions d) The concentration of hydroxide ions
You combine vinegar, that has a pH of 2, with bleach, that has a pH of 14. The mixture will be a
a) Strong Acid b) Strong Base c) Weak Acid d) Weak Base
Which of these does not stay the same during a chemical reaction?
a) The total mass of the atoms b) The arrangement of the atoms c) The mass of each type of atom d) The total number of each type of atom
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