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1. A 0.5131-g sample containing KBr is dissolved in 50 mL of distilled water. Titrating with 0.04614 M AgNO3 requires 25.13 mL to reach the Mohr end point. Report the %w/w KBr in the sample.
2. Calculate the pH of a saturated solution of Ba(OH)2, Ksp = 5.0 x 10¯3
during lightning flashes nitrogen combines with oxygen in the atmosphere to form nitrogen monoxide no which then reacts
What is the ratio of C-14 in a wooden object made in 100 BC to the one made of the same kind of wood in 700 BC? Half life of carbon-14 is 5730 years.
Calculate the Ka of an unknown monoprotic acid. When 15 mL of the acid was titrated with 28 mL of 0.15 M sodium hydroxide the equivalence point was reached at a pH of 8.48.
The Ksp for calcium phosphate is 1.0x10^-33. What is the concentration of Ca2+ in equilibrium with Ca3(PO4)2 if [PO4^3-] = 3.3x10^-5M
Problem- What is the Ea of a reaction in which a first rate constant and temperature are 0.000288 L/mol/s and 595K, and a second rate constant and temperature are 0.00194 L/mol/s and 695K
One of the advantages offered by a synthetic detergent is that it won't form "soap scum" with hard water. Show the chemical reaction that a soap (use RCO2-) undergoes with calcium or magnesium ions
The metal used to make the US nickel coin is an alloy of 75% copper and 25% nickel. What maximum mass of alloy could be produced if only 450 kg of nickel and 1180 kg of copper were on hand?
What molecular events are happening inside the bacterial cell during the period from when the D-glucose is consumed until the culture starts growing again?
Calculate the theoretical and percent yields, b: 20.0g of NaHCO3 is heated to form Na2CO3. Calculate the theoretical loss in weight on heating
A gas stream that contains 1.50 mole% CO2 flows through a pipeline. 20.0 kg/min of CO2 is injected into the line. A sample of the gas is drawn from a point in the line 10 meters downstream of the injection point and found to contain 2.3 mole% CO2.
Explain the volume of a gas is 6.10 L measured at 1.00 atm. Define what is the pressure of the gas in mmHg if the volume is changed to 9.59 L. The temperature remains constant.
Write the chemical equation for the following reaction: Add 1mL of 6M HCl to 1mL of 0.5M Na2SO4. Add a few drops of 1M BaCl2. How do your incorporate the BaCl1 into the chemical equation
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