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What volume of 0.200 M K2Cr2O7 would be required to exactly react with 43.9 mL of 0.150 M KI in acidic solution? The products include Cr3+ ion and I2. What was reduced in the reaction and what was the reducing agent?
When aqueous solutions of lead nitrate and sodium iodide are mixed, a yellow precipitate of lead iodide is formed. Write the molecular, complete ionic
What volume will contain 5.0 mol of aluminium? The density of aluminium is 2.7 g/ml.
A buret containing NaOH solution has an initial reading of 0.14ml. 25.00ml of 0.1000M HCl is titrated to a phenolphthalein end point,
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath. To what temperature (oC) will the oil bath need to be heated to first ..
prove the presence of the cations listed : Sn2+ , cd2+, Cu2+, Bi3+. write four paragraphs about these cations a paragraph each?
A solution of this complex in a 1 cm cuvette had an absorbance of0.760 at this wavelength. Calculate the molarity of this solution.
How long will it take for 100% pearlite to form at 650 °C and at 600 °C? Estimate the hardness values resulting from these transformations.
calculate the approximate amount of sodium thiosulfate pentahydrate needed to prepare 500mL
Still on Le Chatelier's principle, Ketones are known to be less reactive in aldol condensations.
The EPA limit for lead in the water supply is 15 parts per billion by mass. Calculate the number of lead ions present in 1.00kg of water that is at the EPA limit for lead.
a coffee cup calorimeter containing 100ml of 0.30M HCl at 20.3degrees celcius. when 1.82g of Zn solid is added, the temperature rises to 30.5 degrees celcius. what is the heat of reaction per mole of Zn.
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