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The complete reaction of chromium metal with H2SO4 in then absence of air gave a blue solution of chromium(II) ions bounded to six water molecules and Hydrogen gas.
a) Write a balanced molecular formula for the reaction.
b) When an excess of KCN is added to the solution, the color changes and the paramagnetism of the solution decreases. What is the name and formula of the new product?
If the partial pressure of a gas produced in a reaction was determined to be 0.35 atm in a 161.0 mL container and at a temperature of 25.0°C, how many moles of gas were produced? (Hint: Use the ideal gas law and convert temperature to Kelvin, volu..
question 1 when 2.50 g of copper cu reacts with oxygen the copper oxide product has a mass of 2.81g what is the
What volume of glacial acetic acid (18 M) and what weight of sodium acetate trihydrate (CH3COONa•3H2O) are required to make 100 mL of 0.2 M buffer at pH 4.50 (pKa of acetic acid is 4.74)
Nitrogen oxides, NOx, play an essential role in the production of pollutants found in photochemical smog. The NOx in the atmosphere is slowly broken down to N2 and O2 in a first order reaction.
A diprotic acid, H2A, has the following ionization constants: Ka1 = 1.1 multiplied by 10-3 and Ka2 = 2.5 multiplied by 10-6. In order to make up a buffer solution of pH 5.80, which combination would you choose, NaHA/H2A or Na2A/NaHA? What is the p..
A flask contains both A and B. Both decompose following first-order kinetics with half-lives of 50 and 18 minutes, for A and B respectively. If the concentrations of A and B are initially the same, how long will it take for the concentration of A ..
A canister is filled with 310 g of ice and 100 g. of liquid water, both at 0 C . The canister is placed in an oven until all the has boiled off and the canister is empty.
When a solution containing 1.4g of Ba(NO3)2 and 2.4 g of NH2SO3H is boiled, a precipitate forms. This precipitate may be Ba(NH2SO3)2, BaSO4, or BA(NH2)2. You can find these products in the reactions whose equations you balanced in the first reacti..
For each of the following processes, indicate whether the signs of S and H are expected to be positive, negative, or about zero.
How many grams of methanol must be added to 7.50kg of water to lower its freezing point to -15.0^circ C? For each mole of solute, the freezing point of 1 {rm kg} of water is lowered 1.86 ^circ {rm C}
n2h4l o2g reverse reaction arrow n2g 2 h2olcalculate the k value associated with the reaction at 25 degrees celcius
Calculate the pH of a 3.92×10^-3 M solution of H2SO4. (Ka = 0.0120 for HSO4-) 3-In a 4.66×10^-2 M solution, a monoprotic acid, is 20.4% dissociated. Calculate Ka for this acid
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