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Question 19 (5 pts) Which of the following properties are physical properties (P) and which are chemical properties (C)? a) Yellow chlorine gas attacks the silvery metal sodium to form white crystals of sodium chloride b) A magnet separates a mixture of black iron shavings and white sand c) Iron reacts with oxygen to form reddish-brown iron oxide, known as rust d) Iron has a density of 7.86 g/mL e) When a mixture of iron and sulfur is heated it forms iron sulfide Question 20 (5 pts) TRUE / FALSE a) When two ionic solutions are mixed and no precipitate appears, no chemical reaction has occurred. b) When two ionic solutions are mixed and the color of the solution changes, a chemical reaction has occurred. c) When the volume of a gas decreases without change in temperature, the pressure of the gas increases. d) A buffer is a solution that allows large changes in pH of the solution when an acid or base is added. e) The goal of an acid-base titration is to find the change in color of the indicator

          Question 19 (5 pts)
Which of the following properties are physical properties (P) and which are chemical properties (C)?
a) ______ Yellow chlorine gas attacks the silvery metal sodium to form white crystals of sodium chloride
b) ______ A magnet separates a mixture of black iron shavings and white sand
c) ______ Iron reacts with oxygen to form reddish-brown iron oxide, known as rust
d) ______ Iron has a density of 7.86 g/mL
e) ______ When a mixture of iron and sulfur is heated it forms iron sulfide
Question 20 (5 pts) TRUE / FALSE
a) ______ When two ionic solutions are mixed and no precipitate appears, no chemical reaction has occurred.
b) ______ When two ionic solutions are mixed and the color of the solution changes, a chemical reaction has occurred.
c) ______ When the volume of a gas decreases without change in temperature, the pressure of the gas increases.
d) ______ A buffer is a solution that allows large changes in pH of the solution when an acid or base is added.
e) ______ The goal of an acid-base titration is to find the change in color of the indicator

Question 19 (5 pts)
Which of the following properties are physical properties (P) and which are chemical properties (C)?
a) Yellow chlorine gas attacks the silvery metal sodium to form white crystals of sodium chloride
b) A magnet separates a mixture of black iron shavings and white sand
c) Iron reacts with oxygen to form reddish-brown iron oxide, known as rust
d) Iron has a density of 7.86 g/mL
e) When a mixture of iron and sulfur is heated it forms iron sulfide
Question 20 (5 pts) TRUE / FALSE
a) When two ionic solutions are mixed and no precipitate appears, no chemical reaction has occurred.
b) When two ionic solutions are mixed and the color of the solution changes, a chemical reaction has occurred.
c) When the volume of a gas decreases without change in temperature, the pressure of the gas increases.
d) A buffer is a solution that allows large changes in pH of the solution when an acid or base is added.
e) The goal of an acid-base titration is to find the change in color of the indicator

Added by Jaime M.

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