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1. Label the acid and the base, and the conjugate pairs for this reaction. HCO2H+H2O-----> CO2H+H3O 2. Calculate the pH of a 0.25 mol/L solution of magnesium hydroxide. 3. A titration was done to determine the concentration of a sample of HCI. The volume of the acid sample used in each titration trial was 10.00 mL. The following data also was collected: Trial Burette Reading Burette Reading Volume Of Standard @ Start (mL) @ End (mL) Used (mL) 1 0.00 11.30 ? 2 11.30 22.60 ? 3 22.60 33.80 ? Standard Used: 0.25M Ca(OH)2 a. Write the balanced neutralization reaction equation for this titration. b. Write a brief procedure that would have been used to carry out the titration. Just include the key steps (terms and measurements). c. What was the average volume of Ca(OH)2 used? d. Calculate the concentration of the HCI sample.
Barium sulfate, , is used in medical imaging of the gastrointestinal tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail
A 150 -g sample of water is cooled from 30 degrees C to 15 degrees C, thereby losing approximately 9420 J of heat. What is the change in E in J.
A cool solution of sodium nitrite and a solution of the amine in an ice bath. Moderately concentrated hydrochloric acid is added.
Your metropolitan area has been warned by the EPA to lower sulfur dioxide and nitrogen oxide emissions or it will lose substantial federal funding. One citizen's group calls for conservation as a means of drastically reducing electricity consumption.
Calculate the amount of energy in kilojoules needed to change 117g of water ice at -10degrees Celcius to steam at 125 degrees Celcius
Explain why the bond dissociation energy for the C-C sigma bond in propane is lower than the BDE for the C-C bond in propene.
Two determinations of the dissolved oxygen content of a 200 mL sample of water, made five days apart, gave 5.3 ppm and 2.2 ppm of dissolved O2 respectively.
In a solution of acetone and ethanol, the mole fraction of acetone is 0.40. What is the concentration of acetone as a mass percent?
What is the de Broglie wavelength (in meters) of a baseball weighing 145 {g} and traveling at 159 km/h?
Determine the partial pressure of oxygen O2 If the total pres- sure =80 torr, the partial pressure of CO=330 torr and the CO2 has a partial pressure = 330 torr?
Write the balanced equation for the decomposition of one mole of NH4CO2NH2. b) Calculate K at 313 K.
If a gas held at constant pressure had an initial volume of 5.00 L and the temperature changed from 35°C to 578 K what would be the final volume of this gas?
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