A) They do not react with metals. B) They turn blue litmus paper red. C) They taste bitter. D) They turn red litmus paper blue.
A) base and a salt. B) acid and a metal. C) acid and a base. D) salt and water.
A) only for reactions that take place in closed systems. B) for no reactions at all. C) for reactions in both open and closed systems. D) only for reactions that take place in open systems.
A) the pH level of the folution would be less than 3 B) the pH level of the solution would be more than 12 C) the substances would not mix, and you could still take two different pH readings D) the pH level of the solution would be between 3 and 11
A) The apple and lemon have the same pH level. B) The lemon has a lower pH than the apple. C) The apple has a lower pH than the lemon. D) The lemon has a higher pH than the apple.
A) Matter is not created or destroyed. B) Matter is not changed. C) The total mass of the reactants is less than the total mass of the products. D) The total mass of the reactants if greater than the total mass of the products.
A) Endothermic reaction-physical change B) Phase Change-physical change C) Phase Change-chemical change D) Exothermic reaction-physical change
A) exothermic reaction-physical change B) endothermic reaction-chemical change C) Exothermic reaction-chemical change D) endothermic reaction-physical change
A) has a long narrow shape with a smooth texture B) does not burn when a flame is applied C) reacts with hydrochloric acid to release hydrogen gas D) rusts
A) a tree burning after a lightning strike B) steam rising from pavement C) water freezing in a pond D) a tree branch breaking
A) color change B) electromagnetic change C) chemical change D) physical change
A) less than the total mass of the products. B) unrelated to the total mass of the products. C) greater than the total mass of the products. D) exactly equal to the total mass of the products.
A) mass change. B) shape change. C) precipitate. D) a change in color.
A) has pH lower than 7 and taste sour. B) has a pH above 7 and tastes sour. C) has a pH above 7 and tastes bitter. D) turns red litmus paper blue.
A) It is most effective in a slightly basic environment. B) It is most effective in a highly acidic environment. C) Is it most effective in a slightly acidic environment. D) It is most effective in a highly basic environment.
A) conductivity B) melting point C) the ability to reflect light D) reactivity
A) burning B) rusting C) melting D) corroding
A) water turning into steam B) ice melting C) coal burning D) frying an egg
A) breaking a toothpick in half B) melting ice C) toasting a marshmallow D) boiling water
A) a compound B) an atom C) a mixture D) an electron
A) Not all of the products and reactants could be measured because the chemical reaction took place in an open system. B) The chemical reaction created matter. C) The chemical reaction did not work as expected because it took place in a closed system. D) The chemical reaction destroyed matter.
A) matter is being released. B) an exothermic reaction is occuring. C) no reaction is taking place. D) energy is being absorbed by the reaction.
A) B B) A C) C D) D
A) an electron B) an atom C) a compound D) a mixture
A) Sodium gains one electron and chlorine loses on electron. B) Sodium gains seven electrons and chlorine loses seven electrons. C) Sodium loses seven electrons and chlorine gains seven electrons. D) Sodium loses one electron and chlorine gains one electron.
A) It is a new element because a chemical change took place. B) It is a solution because the ingredients cannot be separated. C) It is a new chemical compound because a physical change took place. D) It is a mixture because each ingredient kept its original properties.
A) Baking Soda (pH 8-9) B) Water (pH 6-7) C) Dairy (pH 5-7) D) Citrus Fruit (pH 2-3)
A) a solute. B) a product. C) a solvent. D) a reactant.
A) negatively charged. B) very basic. C) very acidic. D) positively charged.
A) apples B) cheddar cheese C) ham D) green beans
A) a suspension. B) a solute. C) a mixture. D) a solvent.
A) base B) litmus paper C) indicator D) acid
A) True B) False
A) Physical change because a new substance formed. B) Physical change because a precipitate formed.. C) Chemical change because a precipitate formed. D) Chemical change because the mass stayed the same.
A) True B) False |