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Inorganic Chemistry
Explain why NiSO4 is green while ZnSO4 is white
Inorganic Chemistry
Read extensively about the factors affecting rates of reactions, bearing in mind the rate equation, order of reaction, half-life of a reaction as well as activation energy and the Arrhenius equation. 2. If the rate of reaction doubles for every 10 °C rise in temperature, how much faster does the reaction proceed at 45 °C than at 25 °C? At 95 °C than at 25 °C?
Inorganic Chemistry
1. Gases and kinetic molecular theory 1. The behaviour of gases can be described by a number of laws based on experimental observations of their properties. With reference to the ideal gas EQUATION discuss how the molecular theory of gases was developed. 2. Derive an equation that can be used to calculate the density of a gas from its molar mass, pressure, and temperature. 3. What is the density of ethane gas, C2H6, at a pressure of 183.4 kPa and a temperature of 25 °C? 4. What is the pressure in kilopascals in a 35.0 L balloon at 25 °C filled with pure hydrogen gas produced by the reaction of 34.11 g of CaH2 with water? 5. Calculate the volume, in litres, occupied by 1.0 mol of an ideal gas at STP.
Inorganic Chemistry
5. Calculate the mass of sodium nitrate, required to produce 128 g of oxygen. 6. What is the limiting reagent when 0.50 mol of Cr and 1.0 mol of H3PO4 react according to the following chemical equation? 2Cr + 2H3PO4 → 2CrPO4 + 3H2 If 0.20 mol of CrPO4 is recovered from the reaction described above, what is the percent yield? 7. What volume of 0.0125 M hydrogen bromide solution is required to titrate 250 ml of a 0.0100 M calcium hydroxide solution?
Inorganic Chemistry
Calculate which one of the following contains more grams of calcium; 4.6 ×10²⁰ atoms of calcium or 0.050mol of calcium.
Inorganic Chemistry
Hydrolysis of 2‑bromo‑2‑methylpropane (tert‑butyl bromide) yields 2‑methylpropan‑2‑ol. (CH3)3CBr+2H2O⟶(CH3)3COH+H3O++Br− Give the SN1 mechanism. Draw structures, including electrons and charges, and add curved arrows. Details count. Step 1
Inorganic Chemistry
- In some water softening operations, Mg2+ must be removed from solution along with Ca2+. What pH is required to lower TOT Mg to 10 mg/L as CaC03 by precipitation of Mg(OH)2(s)?
- What is the solubility of ferrihydrite (amorphous Fe(OH)3(s)) in an ideal pH 7.0 solution containing 10-2 M TOTS04? Give your answer in ug/L TOTFe.
- A groundwater at pH 7.5 is in equilibrium with PC02 = 10-1•5 atm and with siderite (FeC03(s)). Determine the total dissolved Fe concentration.
Inorganic Chemistry
- Assuming that the partial pressure of oxygen in water is that of atmospheric 02. 0.21 atm, rather than the 1.00 atm assumed in deriving Equation 4.9.5, derive an equation describing the oxidizing PE limit of water as a function of pH.
- Plot log PO2 as a function of PE at pH 7.00.
- Calculate the pressure of oxygen for a system in equilibrium in which [NH4+) = (NO3-) at pH 7.00.
Inorganic Chemistry
Calculate one mole of 1.0g of aspirin; C6H4 (CO2H)(CO2CH3)
Inorganic Chemistry
3. Chemical stoichiometry 1. Calculate the mass of one atom of lead. 2. Determine the number of moles in each of the following a) 25.0 g of propylene, C3H6 b) 1.0 g of aspirin, C6H4(CO2H)(CO2CH3) 3. Calculate which of the following contains more grams of calcium: 4.6 X 1020 atoms of Calcium or 0.050 mol calcium. 4. Calculate the molarity of a concentrated H2SO4 solution of density 1.84 g/ml and Containing 98.0 % H2SO4 solute by mass.
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