1. Jose mixed 10 grams of calcium phosphate and 10 grams of potassium carbonate in an aqueousenvironment. How many grams of potassium phosphate will be produced? Which reactant is thelimiting reactant?2. How many moles of hydrogen gas will be produced from mixing 5.00 grams of Zn and 50mL of 2NHCkag) Solution? How many L of gas is produced, assuming it is behaving as an ideal gas at STP?3. Compute for the molarity (M), molality (m) and normality (N) of the following solutions.a. 2.50 grams of CaClz in 800mL of waterb. 5.40 grams of (NH4)2S04 in 950.0mL of water(Assume that the density of water is 1.00 g/mL)4. What is the osmotic pressure of a solution if 1.50 grams of BaCh has been mixed in a 200mL of0.50M solution of BaCl2? The temperature of the solution is 45°C.5. What is the vapor pressure lowering of the resulting solution in problem 4 if the vapor pressure of thesolvent is 5.00 atm? Assume that the volume of the solvent is the volume of the solution.6. A student was requested to prepare a 500mL of 0.5N solution of M9SO4. The lab teacher required thestudent to change the concentration of the solution by adding 2.50 grams of M9SO4. The boiling pointof water was determined to be 98.5°C while the freezing point was noted at 0.50 °C. What is the finalconcentration of the solution expressed as molality (m) after adding extra M9SO4? What is the boilingpoint and freezing point of the solution?(Use the Kb and Kr values from any reference.)Assume that the volume of-the solvent is also the volume of the solution.

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1. Jose mixed 10 grams of calcium phosphate and 10 grams of potassium carbonate in an aqueous environment. How many grams of potassium phosphate will be produced? Which reactant is the limiting reactant?

1. Jose mixed 10 grams of calcium phosphate and 10 grams of potassium carbonate in an aqueous environment. How many grams of potassium phosphate will be produced? Which reactant is the limiting reactant?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter8: Properties Of Gases

Section: Chapter Questions

Problem 129QRT

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Concept explainers

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

Question

1. Jose mixed 10 grams of calcium phosphate and 10 grams of potassium carbonate in an aqueous
environment. How many grams of potassium phosphate will be produced? Which reactant is the
limiting reactant?
2. How many moles of hydrogen gas will be produced from mixing 5.00 grams of Zn and 50mL of 2N
HCkag) Solution? How many L of gas is produced, assuming it is behaving as an ideal gas at STP?
3. Compute for the molarity (M), molality (m) and normality (N) of the following solutions.
a. 2.50 grams of CaClz in 800mL of water
b. 5.40 grams of (NH4)2S04 in 950.0mL of water
(Assume that the density of water is 1.00 g/mL)
4. What is the osmotic pressure of a solution if 1.50 grams of BaCh has been mixed in a 200mL of
0.50M solution of BaCl2? The temperature of the solution is 45°C.
5. What is the vapor pressure lowering of the resulting solution in problem 4 if the vapor pressure of the
solvent is 5.00 atm? Assume that the volume of the solvent is the volume of the solution.
6. A student was requested to prepare a 500mL of 0.5N solution of M9SO4. The lab teacher required the
student to change the concentration of the solution by adding 2.50 grams of M9SO4. The boiling point
of water was determined to be 98.5°C while the freezing point was noted at 0.50 °C. What is the final
concentration of the solution expressed as molality (m) after adding extra M9SO4? What is the boiling
point and freezing point of the solution?
(Use the Kb and Kr values from any reference.)
Assume that the volume of-the solvent is also the volume of the solution.

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