Question

You have 47.0 mL of a 0.500 M stock solution that must be diluted to 0.100 m. Assuming the volumes are additive, How much water should you add?

(a) 1.How many grams of CaCl2 are needed to make 866.0 g of a solution that is 39.0% (m/m) calcium chloride in water? Note that mass is not technically the same thing as weight, but (m/m) has the same meaning as (w/w).

(a)2. How many grams of water are needed to make this solution?

(b) What is the volume percent (v/v) of an alcohol solution made by dissolving 135 mL of isopropyl alcohol in 747 mL of water?

(c) The mass of solute per 100 mL of solution is abbreviated as % (m/v). How many grams of sucrose are needed to make 735 mL of a 30.0% (w/v) sucrose solution?

Answer #1

You have 47.0 mL of a 0.500 M stock solution that must be diluted to 0.100 m. How much water should you add

Ans:

Amount of water to be added

(a) 1.How many grams of CaCl2 are needed to make 866.0 g of a solution that is 39.0% (m/m) calcium chloride in water?

Ans: Let w g of CaCl2 are needed.

(a)2. How many grams of water are needed to make this solution?

Ans: of water are needed to make this solution.

(b) What is the volume percent (v/v) of an alcohol solution made by dissolving 135 mL of isopropyl alcohol in 747 mL of water?

Ans:

%

(c) The mass of solute per 100 mL of solution is abbreviated as % (m/v). How many grams of sucrose are needed to make 735 mL of a 30.0% (w/v) sucrose solution?

Ans:

You
have 97.0 mL of a 0.500 M stock solution that must be diluted to
0.100 M assuming the volume are additive, how much water should you
add?

1. Isopropyl alcohol is mixed with water to produce a 35.0%
(v/v) alcohol solution. How many milliliters of each component are
present in 745 mL of this solution? (Assume that volumes are
additive.)
1A- _____ mL alcohol
1B-_____ mL water
2. Calculate the volume percent of solute in the following
solutions.
2A- 16.9 mL of methyl alcohol in enough water to give 547 mL of
solution. _____%
2B- 68.1 mL of ethylene glycol in enough water to give 229 mL...

3. In a saturated solution of the ionic compound sodium sulfate,
Na3PO4
all of the water molecules are involved in the hydration
process.
some solid Na3PO4 is present.
all of the above
the concentration of Na+ is three times the
concentration of PO43-.
4. A solution contains 85 grams sucrose and 100. grams of water.
What is the mass percent of the sucrose solution?
5. A solution contains only glycerol and fructose. There is ten
times as much glycerol as...

13.A student mixes 100.0 mL of 0.500
M AgNO3 with 100.0 mL of 0.500 M
CaCl2. (8 points)
a.Write the balanced molecular
equation for the reaction.
b.Write the net ionic equation for
the reaction.
c.How
many grams of precipitate will form?
What
is the concentration of Ag+, NO3‒, Ca2+, and Cl‒in the final solution (assume volumes are
additive)

14. Determine the molarity of a solution made
by dissolving 1.21 moles of CaCl2 in enough water to make 250.0 mL
of solution. (___M CaCl2
15. Determine the molarity of a solution made
by dissolving 34.3 g of Sr(ClO3)2 in enough water to make 250.0 mL
of solution. (___ M Sr(ClO3)2
16. Determine the volume (in mL) of a 1.62
M solution of ZnBr2 that contains 0.299 moles of
ZnBr2.
(____ mL)
17. Determine the mass of solute (in g)...

A sample 25.0 mL of an NaCl solution is diluted to a final
volume of 125.0 mL of 0.200 M NaCl.What was concentration of the
original NaCl solution?How many moles of solute are pipetted from
the original solution?How many moles of solute are in the dilute
solution?
How many moles of product, KHCO3 will be produced
when1.0 mol of K2O reacts with 1.0 mol H2O
and 1.0 mol of CO2?K2O + H2O + 2
CO2 à 2 KHCO3
h) A...

You have 375 mL of a 1.25 M potassium chloride
solution, but you need to make a 0.50 M potassium chloride
solution. How many milliliters of water must you add to the
original 1.25 M solution to make the 0.50 M
potassium chloride solution? Note: Assume the
volumes are additive.
Anwer should be in mL of water.

1A. What Volume of 25.0% glucose must be used to make 925 mL of
3.75% glucose?
1B. If a solution is prepared by dissolving 106.0 g of NaCl in
enough water to make 980.0 mL of solution, what is the %(w/v) of
NaCl?
1C. How much glucose must be used to prepare 525 mL of a 6.85%
(w/v) solution?
1D. What is the % of (w/w) of a NaOH solution prepare by
dissolving 52.4 g of NaOH in 395.0 g...

Make 50.0 mL of a solution that is both 0.15 M in malonic acid,
CH2(CO2H)2 and 0.020 M in MnSO4. Calculate how many grams of
malonic acid to make 50.0 ML of 0.15 M malonic acid an dhow many
grams of MnSO4 + H2O needed to make 50.0 mL of 0.020 M
manganese(II) sulfate solution. Note for a hydrate, the water
molecule in the formula is part of what is weighed out and must be
included in the molar mass...

The recipe say to make 600 ml of a 3 M scurose solution. The
chemical formula for sucrose is C12H22O11.
1. How many moles of sucrose will you need?
2. What is the gram formula mass of sucrose (just round each
mass to one decimal place)
3. How much table sugar will you weigh out?
4. How much water will you need?

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