Transcript stoic2.0_.ppt

REACTION STOICHIOMETRY FACTOR LABEL LOGIC
2 C6H14(g) + 19 O2 (g) 12 CO2(g) + 14 H20(g)
CALCULATE THE YIELD OF WATER IN GRAMS IF 32 GRAMS
OF OXYGEN IS CONSUMED IN THE ABOVE BALANCED
REACTION.
KNOWN
32.O g O2
( ) ( )( )
1 mol O2
14mol H2O
18 g H2O
32 g O2
19 mol O2
1 mol H2O
CONVERT KNOWN TO
MOLES FROM GRAMS,
GRAMS CANCEL.
MOLAR MASS OF O2 IS
32 G/MOL. GIVES
MOLES OF KNOWN.
MOLES =
MASS
MOLAR MASS
MOLE RATIO: RATIO
MOLES OF OBJECTIVE
TO MOLES OF KNOWN.,
USE COEFFICIENTS OF
BALANCED REACTION.
THIS STEP GIVES MOLES
OF OBJECTIVE.
=
OBJECTIVE
13.23g H2O
CONVERT MOLES OF
OBJECTIVE TO GRAMS.
THIS STEP GIVES GRAMS
OF OBJECTIVE, WHICH
THE QUESTION CALLED
FOR
REACTION STOICHIOMETRY FACTOR LABEL LOGIC
2 C6H14(g) + 19 O2 (g) 12 CO2(g) + 14 H20(g)
CALCULATE THE YIELD OF CO2 IN GRAMS IF 16. GRAMS OF
OXYGEN IS CONSUMED IN THE ABOVE BALANCED
REACTION.
KNOWN
16.O g O2
( ) ( )( )
1 mol O2
32 g O2
12mol CO2
19 mol O2
44 gCO2
1 mol CO2
=
OBJECTIVE
13.89g CO2
REACTION STOICHIOMETRY FACTOR LABEL LOGIC
2 C6H14(g) + 19 O2 (g) 12 CO2(g) + 14 H20(g)
CALCULATE THE YIELD OF C6H14 IN GRAMS IF 16. GRAMS OF
OXYGEN IS CONSUMED IN THE ABOVE BALANCED
REACTION.
KNOWN
16.O g O2
( )( )( )
1 mol O2
2mol C6H14
86 gC6H14
32 g O2
19 mol O2
1 molC6H14
=
OBJECTIVE
4.53g C6H14
REACTION STOICHIOMETRY FACTOR LABEL LOGIC
2 KClO3(s)  3 O2(g) + 2 KCl(s)
KNOWN
6 MOLES
O2
(
2 MOLES
KClO3
3 MOLES O2
)
=
OBJECTIVE
4 MOL KClO3
KNOWN
0.5 C2 H2
mol
( )( )
5 mol O2
32g O2
2 mol C2H2
1 mol O2
MOLE RATIO: RATIO
MOLES OF OBJECTIVE
TO MOLES OF KNOWN.,
USE COEFFICIENTS OF
BALANCED REACTION.
THIS STEP GIVES MOLES
OF OBJECTIVE.
=
OBJECTIVE
40 g O2
CONVERT MOLES OF
OBJECTIVE TO GRAMS.
THIS STEP GIVES GRAMS
OF OBJECTIVE, WHICH
THE QUESTION CALLED
FOR
KNOWN
32.O g Cu
( ) ( )( )
1 mol Cu
2mol H2O
18 g H2O
64 g Cu
1 mol Cu
1 mol H2O
CONVERT KNOWN TO
MOLES FROM GRAMS,
GRAMS CANCEL.
MOLAR MASS OF Cu IS
64 G/MOL. GIVES
MOLES OF KNOWN.
MOLES =
MASS
MOLAR MASS
MOLE RATIO: RATIO
MOLES OF OBJECTIVE
TO MOLES OF KNOWN.,
USE COEFFICIENTS OF
BALANCED REACTION.
THIS STEP GIVES MOLES
OF OBJECTIVE.
=
OBJECTIVE
18 g H2O
CONVERT MOLES OF
OBJECTIVE TO GRAMS.
THIS STEP GIVES GRAMS
OF OBJECTIVE, WHICH
THE QUESTION CALLED
FOR
KNOWN
22 g C3H8
( ) ( )( )
1mol C3H8
44 g C3H8
CONVERT KNOWN TO
MOLES FROM GRAMS,
GRAMS CANCEL.
MOLAR MASS IS 44
g/MOL. GIVES MOLES
OF KNOWN.
MOLES =
MASS
MOLAR MASS
4 mol H2O
1 mol C3H8
MOLE RATIO: RATIO
MOLES OF OBJECTIVE
TO MOLES OF KNOWN.,
USE COEFFICIENTS OF
BALANCED REACTION.
THIS STEP GIVES MOLES
OF OBJECTIVE.
18 g H2O
=
OBJECTIVE
36g H2O
1 mol H2O
CONVERT MOLES OF
OBJECTIVE TO GRAMS.
THIS STEP GIVES GRAMS
OF OBJECTIVE, WHICH
THE QUESTION CALLED
FOR