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You add an excess of Ca(OH)2 to water maintained at a particular temperature, stir until the solution is saturated, filter, then determine the [OH?] in the solution by titration with acid. Titration of 25 mL of the calcium hydroxide solution to the endpoint requires 12.15 mL of 0.070M HCl solution. a) What is the millimolar quantiy of OH? in the 25 mL of solution? b) What are the concentrations of Ca2+ and OH?? c) What is the solubility of Ca(OH)2 under these conditions? (Expressed as g/dL). d) What is the Ksp for Ca(OH)2 under these conditions?
which anions generally form percipitates? what are the exceptions?
An adiabatic turbine expands steam from 500oC , 3.5 MPa to 200oC and 0.3 MPa. If the turbine generates 750 kW, what is the flow rate of steam through the turbine
How many grams of aluminum metal and how many liters of chlorine gas can be produced by passage of 4.8 amp of current for 2.3 hour under standard conditions (25?C and 1 atm pressure)?
What volume of hydrogen gas is produced when 68.4 g of iron reacts completely according to the following reaction at 25 C and 1 atm iron (s) + hydrochloric acid (aq)--------- iron(II) chloride (aq) + hydrogen (g)
Given the balanced equation: C2H4 + 3O2 → 2CO2 + 2H2O How many liters of CO2 are produced when 15 liters of O2 are consumed?
when using a rotary evaporator, the water bath is typically kept at a temperature below the normal boiling point of the solvent to be evaporated
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1 nm. What is the value of n for the level to which the electron relaxed
A piece of metal of mass 22 g at 92C is placed in a calorimeter containing 53.7 g of water at 21C. The final temperature of the mixture is 55.3C. What is the specific heat capacity of the metal?
Determine whether each of the phrases or examples describes a thioester, reduced cofactor, or phosphorylated compound:
A titration is performed by adding 0.400 M KOH to 40.0 mL of 0.300 M HCl. What is the pH after addition of 20.0 mL of the base
How many moles of NiCl can be formed in the reaction of 5.00 mol of Ni and 10.0 mol of HCl
Determine the mean and 90% confidence interval for the average fluoride concentration in this sample.
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