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20 ml Calcium Hydroxide solution was titrated with 9.8 ml 0.0105 M HCl in according to reaction: Ca(OH)2 + 2HCl ? CaCl2 + 2H2O
The true value of solubility product constant (Ksp) of Ca(OH)2 at 25 C is 1.3x10-6.
What is molar solubility of Ca(OH)2 in pure water at this temperature?
A 100.0ml sample of 0.100M methylamine(CH3NH2, kb=3.7x10-4) is titrated with 0.250M HNO3. Calculate the pH after the addition of each of the following volumes of acid. a) 0.0 ml b) 20.0 ml c) 40.0 ml d)60.0 ml
A sample of hydrogen gas occupies 15.8 L at STP. How many moles of the gas are present?
how much energy is required to heat an iron nail with a mass of 7g from 25 degrees celcius until it becomes red hot at 750 degrees celcius?
If 37.4 grams of water decomposes at 297 Kelvin and 1.30 atmospheres, how many liters of oxygen gas can be produced? 2 H2O (l) yields 2 H2 (g) + O2 (g)
A mixture of 0.152 moles of C is reacted with 0.117 moles of O2 in a sealed, 10.0L vessal at 500K, producing a mixture of Co and CO2. The total pressure is 0.6879 atm. What is the partial pressure of CO?
In an Fe and Cr voltaic cell where the Fe is in Fe(NO3)2 and the Cr is in Cr(NO3)3; calculate the cell potential at 25 C if the initial concentration in the half cells are as follows [Cr 3+] = 2.45M and [Fe 2+] = .75 M
Volume after mixing is 131mL. Kf=1.86 C/m -- Kb=0.512 C/m Calculate the freezing point and boiling point?
How much heat is required to warm 219 g of ice from -45.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C
Explain the chemical reactions that have possibly taken place in his body after the exercise. Discuss possible treatments for the freshman and how the treatment works chemically.
When adding the solution of HNO3 from the buret in Step 14 to beaker 4, you know that you added 2.5 mL instead of 1.5 mL for a total volume of 11.0 mL. How would the calculated value of the equilibrium constant be affected for this sample?
Calculate the pH at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr
if 0.55 g of a gas dissolves in 1.0 l of water at 20.0 kPa of pressure, how much will dissolve at 110.0 kPa of pressure?
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