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Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
1) 2.0×10-2 M CaCl2 [KOH]=?
2) 2.1×10-3 M Fe(NO3)2 [KOH]=?
A 50.0 g sample of liquid water at 25.0 degree C is mixed with 29.0 g of water at 45 degree C. The final temperature of the water is ___________ degree C. The pecific heat capacity of liquid water is 4.18 J/g-K.
The solubility of oxygen in lakes high in the rocky mountains is affected by the altitude. If the solubility of O2 from the air is 2.67 x 10^-4 M ar sea level (1.00 atm) and 25 degrees C
the total elute from the column was diluted to 250 mL and a 50 mL aliquot was titrated with 11.35 mL of 0.10359 M sodium hydroxide. Calculate the percentage of ammonium ion in the sample.
A system absorbs 192 kj of heat and the surroundings do 110 kj of work on the system. what is the change in internal energy of the system.
A sample of propane gas occupies 625cm3 at 20 degrees Celcius and 750 torr. What is the final volume at -80 degrees celcius and 750 torr
The absorbance at 595 nm was 0.78 and, according to a standard curve, corresponds to 0.015 mg of protein on the x-axis. What is the protein concentration of the original solution?
capacity change if you add 0.2 M of benzoic acid to the buffer made of 0.3 M of acetic acid and 0.5 M of sodium acetate
Important information about Heat and temperature, What is Heat? What is temperature? What are the various properties that account for temperature?
Cl2(g) + F2(g) 2 ClF(g) Kc = 19.9 For the reaction forming ClF the initial concentrations are as follows: [Cl2] = 0.5 M ; [F2] = 0.2 M ; [ClF] = 7.3 M Is the reaction at equilibrium? If not, in which direction with the reaction shift to reach eq..
Neglect the absorption of other waste gas components into the water, and the evaporation of water into the waste gas stream. What rate is NH3 is being removed from the feed gas? mol/hr
The reactant concentration in a first-order reaction was 6.70×10-2 after 25.0 and 3.30×10-3 after 100 . What is the rate constant for this reaction?
What is the chemical symbol for this element? Use stoichiometry to create an equation that allows you to solve for the molecular weight of X.
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