CHEM Lab Exam 1 Questions And
Answers
/. how would the average value of mass of water be affected if the balance on which the
weights were determined was inaccurately calibrated and read 0.05 g low on all
readings - Answer-no effect
/.how would the average value of the mass of water be affected if the mass of the empty
beaker was incorrectly recorded as weighing 0.5 g too low, but all other weights were
recorded correctly - Answer-0.5 g too high
/.A set of 'F and 'C data was obtained in which the 'F thermometer was consistently 2
degrees high. Assuming the 'C readings were correct, what would this error affect? -
Answer-intercept of the equation
/.what physical property does a plot of the line of mass vs volume represent - Answer-
density
/.sanding a piece of wood is a - Answer-physical property
/.mixing oil and vinegar is a - Answer-physical property
/.milk becoming sour is a - Answer-chemical property
/.a car hood rusting is a - Answer-chemical property
/.HBr is a - Answer-acid
/.Ba(OH)2 is a - Answer-base
/.LiOH is a - Answer-base
/.HNO3 is a - Answer-acid
/.how can you test for carbonate ion in a mineral - Answer-double replacement reaction
by adding an acid to see if it produces CO2 which would mean it contains CO3
/.WATER
color
litmus paper
conductivity
HCl test
NaOH test
, KSCN test - Answer-clear
NA
no
clear
clear
clear
/.SUCROSE
color
litmus paper
conductivity
HCl test
NaOH test
KSCN test - Answer-clear
NA
no
clear
clear
clear
/.IRON (III) NITRATE
color
litmus paper
conductivity
HCl test
NaOH test
KSCN test - Answer-clear
red
yes
NA
NA
red
/.SODIUM CARBONATE
color
litmus paper
conductivity
HCl test
NaOH test
KSCN test - Answer-clear
blue
yes
clear, bubble
clear
clear
Answers
/. how would the average value of mass of water be affected if the balance on which the
weights were determined was inaccurately calibrated and read 0.05 g low on all
readings - Answer-no effect
/.how would the average value of the mass of water be affected if the mass of the empty
beaker was incorrectly recorded as weighing 0.5 g too low, but all other weights were
recorded correctly - Answer-0.5 g too high
/.A set of 'F and 'C data was obtained in which the 'F thermometer was consistently 2
degrees high. Assuming the 'C readings were correct, what would this error affect? -
Answer-intercept of the equation
/.what physical property does a plot of the line of mass vs volume represent - Answer-
density
/.sanding a piece of wood is a - Answer-physical property
/.mixing oil and vinegar is a - Answer-physical property
/.milk becoming sour is a - Answer-chemical property
/.a car hood rusting is a - Answer-chemical property
/.HBr is a - Answer-acid
/.Ba(OH)2 is a - Answer-base
/.LiOH is a - Answer-base
/.HNO3 is a - Answer-acid
/.how can you test for carbonate ion in a mineral - Answer-double replacement reaction
by adding an acid to see if it produces CO2 which would mean it contains CO3
/.WATER
color
litmus paper
conductivity
HCl test
NaOH test
, KSCN test - Answer-clear
NA
no
clear
clear
clear
/.SUCROSE
color
litmus paper
conductivity
HCl test
NaOH test
KSCN test - Answer-clear
NA
no
clear
clear
clear
/.IRON (III) NITRATE
color
litmus paper
conductivity
HCl test
NaOH test
KSCN test - Answer-clear
red
yes
NA
NA
red
/.SODIUM CARBONATE
color
litmus paper
conductivity
HCl test
NaOH test
KSCN test - Answer-clear
blue
yes
clear, bubble
clear
clear
