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Propanoic acid (CH3CH2COOH) has a Ka of 1.34 × 10-5. A 25.00 mL sample of 0.1000 M propanoic acid (in flask) is titrated with 0.1000 M NaOH solution, added from a buret. Carry out the calculations of the quantities indicated below, & put your answers in the boxes below.
1. The pH after 0.00 mL of NaOH are added.
2. The pH after 15.00 mL of NaOH are added.
3. The hydroxide ion concentration after 26.00 mL of NaOH are added.
Draw a reaction mechanism for the reaction between 1-bromobutane and sodium t-butoxide( 2-methyl-2-propoxide). also identify the rate determining stepand use curved arrows
You dilute 1g of the soap 1:106 and plate it on standard plate count agar. After 24 hours of incubation, there are 168 colonies. How many bacteria were on the soap? How did they get there?
what is the wavelength emitted due to an electron moving from an infinitely far orbit (n=infinity) to n=2? in what region of the electromagnetic spectrum is this wavelength
An absorption measurement of this ASA solution at 275 nm in a UV-vis spectrometer with a 1.00 cm cell was 0.78. The solvent had an absorbance of 0.01 at 275 nm. Measurement of a 4.05x10-4 M ASA standard solution at 275 nm was 0.579.
The vapor pressure of benzene is 53.3 kPa at 60.6°C, but it falls to 51.5 kPa when 19.0 g of a nonvolatile unknown organic compound is dissolved in 500 g of benzene. Calculate the molar mass of the compound.
which 1.0 m acid solution has the largest concentration of hydronium
A certain substance has a heat of vaporization of 44.01 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 289 K?
reacting 931 mol of sio2 with excess carbon yields 29.6 kg of sic. what is the percentage
The quality of a two-phase liquid-vapor mixture of H2O at 40Oc with a specific volume of 10m3/Kg is
A 1-in. thick steel plate measuring 10 in. in diameter is heated from below by a hot plate, its upper surface exposed to air at 80oF. The heat-transfer coefficient on the upper surface is 5 Btu/h ftoF and k for steel is 25 Btu/h ftoF.
Eventually, his mother decides to take him to the doctor who diagnoses it as an acute case of middle ear infection (otitis media), and prescribes amoxicillin for his treatment. He weighs 44lb, and the daily dose of amoxicillin for the treatment of..
What is the correct positions of the methyl group and the isopropyl group in the most stable chair confirmation of cis-1-isopropyl-2-methylcyclhexane
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