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When a strong acid and strong base titration is not at equivalence, the pH can be found by finding the number of moles of H3O+ or OH- in excess, converting to [H3O+] or [OH-], and solving for the pH.
What is the pH of a solution of 25.0mL of 1.00x10-3M HCl(aq) that has been titrated with 49.45mL of 6.81x10-3M NaOH? Assume 25°C.
Use the pKa cata to help you predict the products of the reactions. Use curved arrows to show electron flow. Predict whether the equilibrium lies to the left or to the right and calculate the equilibrium constant for the reaction.
A technician was accidentally exposed to potassium-42 while doing some brain scans for possible tumors. the error was not discovered until 48h later when the activity of the potassium-42 sample was 2.1?ci .if potassium-42 has a half-life of 12 h
The volume of a manifold used to transfer gases is calibrated using Boyle's Law. A 0.251-dm3 flask at pressure of 697 Torr is attached and after system pumpdown,
The product is collected over water at 25.0 . How much time is required to produce 146.0 of the products at a barometric pressure of 753.7. The vapor pressure of water at this temperature is 23.8.
Use these data, plus the information given below for CO2 and H2O, to estimate the standard enthalpy of formation, ofH?, at 25 oC for this compound. ofH? values at 25 oC for CO2(g) and H2O(l) are ?394 kJ mol?1 and ?286 kJ mol?1, respectively
36.0% sodium chloride or table salt, and the rest being sodium bicarbonate or baking soda, How many grams of baking soda are present in the sample?
Calculate the solubility-product constant for Nd2(CO3)3. Ksp = (c) The Ksp of Ga(OH)3 at 25 oC is 7.28e-36. What is the molar solubility of Ga(OH)3? solubility = mol/L
Assume it took the entire allotted time. If we used anisole instead of methyl benzoate to run an analogous reaction, how much time would a similar nitration reaction take.
Explain which of the following species has the weakest N-to-O covalent bond: HONO, NO2-, NO2, N2O, NO3-
Diagram a hydrolysis reaction (using expanded structural formula) of butene. Be sure to include all the possible products formed. Name the product(s).
A 1 M solution of acetic acid is generated and a pH of 4.74 is measured. What is the percent dissociation
A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz or SiO2), and iodine.
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