a) Does a reaction occur when aqueous solutions of manganese(II) sulfate and barium bromide are combined? If a reaction does occur, write the net ionic equation. b)Does a reaction occur when aqueous solutions of lead(II) nitrate and chromium(II) bromide are combined? If a reaction does occur, write the net ionic equation. c)Does a reaction occur when aqueous solutions of sodium sulfide and chromium(II) sulfate are combined? If a reaction does occur, write the net ionic equation. d) You need to make an aqueous solution of 0.159 M magnesium bromide for an experiment in lab, using a 500 mL volumetric flask. How much solid magnesium bromide should you add? e) How many milliliters of an aqueous solution of 0.204 M iron(II) iodide is needed to obtain 17.5 grams of the salt? f) In the laboratory you dissolve 23.9 g of manganese(II) nitrate in a volumetric flask and add water to a total volume of 375 . mL.What is the molarity of the solution? g)In the laboratory you dilute 5.07 mL of a concentrated 6.00 M hydrochloric acid solution to a total volume of 175 mL. What is the concentration of the dilute solution? h)You wish to make a 0.402 M perchloric acid solution from a stock solution of 3.00 M perchloric acid. How much concentrated acid must you add to obtain a total volume of 175 mL of the dilute solution? i) You wish to make a 0.334 M hydrobromic acid solution from a stock solution of 12.0 M hydrobromic acid. How much concentrated acid must you add to obtain a total volume of 150 mL of the dilute solution? j)How many grams of Cu(OH)2 will precipitate when excess NaOH solution is added to 79.0 mL of 0.606 M CuSO4 solution?CuSO4(aq) + 2NaOH(aq) Cu(OH)2(s) + Na2SO4(aq) k) How many mL of 0.676 M HCl are needed to dissolve 7.81 g of CaCO3?2HCl(aq) + CaCO3(s) CaCl2(aq) + H2O(l) + CO2(g) l) Calculate the number of milliliters of 0.589 M Ba(OH)2 required to precipitate all of the Zn2+ ions in 180 mL of 0.453 M ZnI2 solution as Zn(OH)2. The equation for the reaction is:ZnI2(aq) + Ba(OH)2(aq) Zn(OH)2(s) + BaI2(aq) ____ mL Ba(OH)2 m) A 11.6 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid.If 25.6 mL of 1.08 M sodium hydroxide are required to neutralize the hydrochloric acid, what is the percent by mass of hydrochloric acid in the mixture? n) A 10.4 g sample of an aqueous solution of perchloric acid contains an unknown amount of the acid.If 23.8 mL of 0.832 M barium hydroxide are required to neutralize the perchloric acid, what is the percent by mass of perchloric acid in the mixture? o) A 13.4 g sample of an aqueous solution of hydrobromic acid contains an unknown amount of the acid.If 19.4 mL of 1.97 M sodium hydroxide are required to neutralize the hydrobromic acid, what is the percent by mass of hydrobromic acid in the mixture? p) What volume of a 0.371 M hydrobromic acid solution is required to neutralize 15.5 mL of a 0.159 M barium hydroxide solution? _______ mL hydrobromic acid q) What volume of a 0.141 M hydroiodic acid solution is required to neutralize 17.9 mL of a 0.147 M calcium hydroxide solution? ______ mL hydroiodic acid
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.
a) Does a reaction occur when aqueous solutions of manganese(II) sulfate and barium bromide are combined?
If a reaction does occur, write the net ionic equation.
b)Does a reaction occur when aqueous solutions of lead(II) nitrate and chromium(II) bromide are combined?
If a reaction does occur, write the net ionic equation.
c)Does a reaction occur when aqueous solutions of sodium sulfide and chromium(II) sulfate are combined?
If a reaction does occur, write the net ionic equation.
d) You need to make an aqueous solution of 0.159 M magnesium bromide for an experiment in lab, using a 500 mL volumetric flask. How much solid magnesium bromide should you add?
e) How many milliliters of an aqueous solution of 0.204 M iron(II) iodide is needed to obtain 17.5 grams of the salt?
f) In the laboratory you dissolve 23.9 g of manganese(II) nitrate in a volumetric flask and add water to a total volume of 375 . mL.
What is the molarity of the solution?
g)In the laboratory you dilute 5.07 mL of a concentrated 6.00 M hydrochloric acid solution to a total volume of 175 mL. What is the concentration of the dilute solution?
h)You wish to make a 0.402 M perchloric acid solution from a stock solution of 3.00 M perchloric acid. How much concentrated acid must you add to obtain a total volume of 175 mL of the dilute solution?
i) You wish to make a 0.334 M hydrobromic acid solution from a stock solution of 12.0 M hydrobromic acid. How much concentrated acid must you add to obtain a total volume of 150 mL of the dilute solution?
j)How many grams of Cu(OH)2 will precipitate when excess NaOH solution is added to 79.0 mL of 0.606 M CuSO4 solution?
CuSO4(aq) + 2NaOH(aq) Cu(OH)2(s) + Na2SO4(aq)
k) How many mL of 0.676 M HCl are needed to dissolve 7.81 g of CaCO3?
2HCl(aq) + CaCO3(s) CaCl2(aq) + H2O(l) + CO2(g)
l) Calculate the number of milliliters of 0.589 M Ba(OH)2 required to precipitate all of the Zn2+ ions in 180 mL of 0.453 M ZnI2 solution as Zn(OH)2. The equation for the reaction is:
ZnI2(aq) + Ba(OH)2(aq) Zn(OH)2(s) + BaI2(aq)
____ mL Ba(OH)2
m) A 11.6 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid.
If 25.6 mL of 1.08 M sodium hydroxide are required to neutralize the hydrochloric acid, what is the percent by mass of hydrochloric acid in the mixture?
n) A 10.4 g sample of an aqueous solution of perchloric acid contains an unknown amount of the acid.
If 23.8 mL of 0.832 M barium hydroxide are required to neutralize the perchloric acid, what is the percent by mass of perchloric acid in the mixture?
o) A 13.4 g sample of an aqueous solution of hydrobromic acid contains an unknown amount of the acid.
If 19.4 mL of 1.97 M sodium hydroxide are required to neutralize the hydrobromic acid, what is the percent by mass of hydrobromic acid in the mixture?
p) What volume of a 0.371 M hydrobromic acid solution is required to neutralize 15.5 mL of a 0.159 M barium hydroxide solution?
_______ mL hydrobromic acid
q) What volume of a 0.141 M hydroiodic acid solution is required to neutralize 17.9 mL of a 0.147 M calcium hydroxide solution?
______ mL hydroiodic acid
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