Transcript 999thableGreview

(70 DC, 139 g)
#1
How many grams of KNO3 are needed
to saturate 50. grams of water at 70o
.
• Saturated, on the curve.
•The quantity of water is not 50.
grams, you must divide the solubility
from table G by 2.
At 70. DC 139. grams will saturate
KNO3 in 100.g of water.
Scale the solubility grams from the
standard 100g of water on table G to
the 50. grams asked for on the
question.
139
100
X
=
X
50
= about 69.5 grams
#2
How many grams of KClO3 are needed
to saturate 100. grams of water at
40o .
• Saturated, on the curve.
•The quantity of water is 100, read
from table G directly.
At 40. DC about 16. grams will
saturate KClO3 in 100.g of water,
that’s the answer!
(40 DC, 16 g)
#3)
How many grams of KClO3 are needed
to saturate 100. grams of water at
40o .
• Saturated, on the curve.
•The quantity of water is 100, read
from table G directly.
At 40. DC about 16. grams will
saturate KClO3 in 100.g of water,
that’s the answer!
(40 DC, 16 g)
#4)
A solution contains 14 g. of KCl in
100g of water at 40DC. What is the
minimum amount of KCl needed to
saturate the solution.
• Saturated, on the curve.
•The quantity of water is 100, read
from table G directly.
At 40. DC about 38 of KCl can
dissolve, in 100g of water.
(40 DC, 38 g)
24g\
(40 DC, 14 g)
THE QUESTION INDICATED ONLY
14 GRAMS WAS DISSOLVED,
HOWEVER 38 GRAMS CAN DISSOLVE,
THEREFORE YOU NEED 24 MORE TO
BRING THE 14 GRAMS TO
SATURATION.
#5)
How many grams of NaNO3 per 100g
of water would produce a
supersaturated solution?
•100g of water, read directly off of
Ans..ABOVE CURVE…SUPERSATURATED table G.
40DC,110g)
•Look for a coordinate ABOVE the
curve of sodium nitrate.
(30DC,90g)…UNSATURATED
(20DC,800g)…UNSATURATED
(10DC, 60g)…UNSATURATED
THESE COORDINATES
ARE UNDER THE
SODIUM NITRATE
CURVE…UNSATURATEDC
URVE,
#7)
•A SOLUTION CONTAINS 90 GRAMS
OF A DISSOLVED SALT IN 100g of
WATER AT 40DC. Which is
unsaturated.
• read directly off of table G.
•Look for a coordinate BELOW the
curve of ONE OF THE SALTS..
(40DC,90g)…UNSATURATED
FOR Sodium Nitrate, it is the
only salt this coordinate is
under.
THIS COORDINATE is
UNDER THE SODIUM
NITRATE
CURVE…UNSATURATEDC
URVE,