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A concentrated HCl solution contains 37% w/w HCl. The specific gravity of the solution is 1.19 g/mL. Calculate its molarity
What volume of 8.50 M H3PO4 is required to prepare 204 mL of a 0.750 M solution?
Mass of lead (II) oxide needed to deposit 20.561g of lead metal
Consider the reaction: 2KClO3 → 2KCl + 3O2
A sample of 5.45 L of oxygen is collected over water at a total pressure of
735.5 torr at 25°C. How many grams of oxygen have been collected? (at
25°C, the vapour pressure of water is 23.8 torr)
A sample of 5.45 L of oxygen is collected over water at a total pressure of
735.5 torr at 25°C. How many grams of oxygen have been collected? (at
25°C, the vapour pressure of water is 23.8 torr)
Balance equation of : 20cm^3 of 0.5 mol dm^-3 hydrocloric acid + excess of magnesium powder and 20cm^3 of 0.5 mol dm^-3 sulphric acid + excess of magnesium powder.
How many moles of aluminum oxide (Al2O3) are produced when 4.0 moles of aluminum (Al) are combined with Oxygen gas (O2)?
Two systems have the following equations of state and are contained in a closed cylinder, separated by a fixed, adiabatic and impermeable piston. N1 = 2 and N2 = 1.5 moles. The initial temperatures are T1 = 175 K and T2 = 400 K. The total volume is 0.025 m3. The piston is allowed to move and heat transfer is allowed across the piston. Determine the final temperature of the system (in Kelvin).
A solution is made by mixing 500 mL of 0.1 2M NaOH solution with 500 mL of 0.1M. Mg(NO3)2
Ksp for Mg(OH)2. =1.8 x10
What will Mg^+2 and OH^- be after mixing?
Write down the value of the ionic product quotient
Does a precipitate form?
Ksp for Mg(OH)2. =1.8 x10
What will Mg^+2 and OH^- be after mixing?
Write down the value of the ionic product quotient
Does a precipitate form?
As part of a geological team that studied a local cave, you brought with you a bunch of
1.00 g rock samples to be studied. Each rock was prepared and titrated against 0.050 M
EDTA
a. Calculate the percent calcite (CaCO3) content of rock A if it was titrated with
48.0 mL EDTA
b. Calculate the percent brucite (Mg(OH)2) content of rock B if it was titrated
with 76.5 mL EDTA
1.00 g rock samples to be studied. Each rock was prepared and titrated against 0.050 M
EDTA
a. Calculate the percent calcite (CaCO3) content of rock A if it was titrated with
48.0 mL EDTA
b. Calculate the percent brucite (Mg(OH)2) content of rock B if it was titrated
with 76.5 mL EDTA
Account for the difference in color of the filtrate of aqueous methylene blue and that of the original mixture. What is the importance of the principle of adsorption in colloidal system? What determines the adsorbing power of a given adsorbent? Relate this to colloidal system
