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Explain why the salt of a weak acid, as well as the acid itself, must be present to form a bu?er solution.
Determine the final concentration if a 144-mL portion of that solution is diluted using water of 143 mL ?
A student was given a standard Fe(s) | Fe2+(aq) half-cell and another halfcell containing an unknown metal M immersed in 1 M MNO3(aq).
Which one of these equations describes a redox reaction?
A 787 mL gas sample at STP is compressed to a volume of 226 mL, and the temperature is increased to 29?C. What is the new pressure of the gas in Pa.
what is the reaction mechanism for the formation of isoamyl acetate from the esterification reaction of isoamyl alcohol and ethyl acetate with a sulfuric acid catalyst?
If 1.32g of al were reacted with an excess HCl, what amount of Hydrogen gas would be theoridocially be admitted at STP?
Calculate the amount of heat liberated (in kJ) from 355 g of mercury when it cools from 76.0°C to 13.0°C.
Some sugar substitutes are made from derivatives of sucrose. SucraloseTM is a sweetener found in soft drinks and low-calorie foods such as yogurt.
calculate the molality of each of the following solutions: a)14.3g of sucrose in 676g ofwater b)7.20 moles of ethylene glycol in 3546g of water.
If this energy were used to vaporize water at 100 degrees C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
What is the concentration of hydrogen ions in a solution containing 0.321 M HOCN (cyanic acid) and 0.223 M (NaOCN) (sodium cyanate)? The ionization constant of cyanic acid is 3.5 × 10-4.
In a titration, 0.0 mL of 0.025 M hydrochloric acid is added to 30.0 mL of 0.030 M ammonia. What is the pH of the resulting mixture?
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