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Calculate the pH of 0.515 L of a 0.210 M NH_4Cl and 0.210 M NH_3 buffer before and after the addition of the following substances. Assume that the volume remains constant.
Calculate the initial pH =
Calculate the pH after the addition of 0.0048 mol of NaOH.
Calculate the pH after the addition of 0.018 mol of HCl.
How to calculate the ratio of the masses of the buffer components required to make the buffer? m(NH3) / m(NH4Cl) ph= 9.00
Calculate the concentration of Ag+ in a solution prepared by mixing equal volumes of 2.0×10-3M AgNO3 and 0.20M NaCN .
90.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.5.
certain anesthetic contains nbspcho by 64.9 13.5 21.6 nbspby mass. determine the molecular formula of the compound at
A 4.80 g nugget of pure gold absorbed 288 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C.
A lead bullet is fired at a wooden plank. At what speed must bullet travel to melt on impact, if its initial temperature is 25oC and the heating of the plank is neglected.
A 100.0-mL aqueous sodium chloride solution is 14.5% NaCl by mass and has a density of 1.12 g/mL. What mass of solute would you add to make the boiling point of the solution 104.2 degree C? (Use i = 1.8 for NaCl)
Determine what ventilation rate (minimum) in m3/hr will be essential to keep the carbon monoxide concentration in his garage from the dangerous level of 1600 ppmv? What is your answer in this case?
Give the name and formula for the acid derived from each of the following anions. (Type your answer using the format CO2 for CO2.) (a) perchlorate (b) NO3- (c) bromite (d) F -
How many grams of ice at 0°C and 101.3kPa could be melted by the addition of 0.40kJ of heat? Find the molar heat of fusion.
Write balanced net ionic equation for the neutralization of equal molar amounts of HNO_2 and KOH
Write the half reactions (reactions at Anode and Cathode) and net redox reaction and explain the diagram
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