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Problem- A beaker with 160mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.80mL of a 0.340MHCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
State your answer by means of two significant figures.
Classify the following systems as either open, or closed andthermally insulated, or thermally connected, or isolated. a) Hot coffee in a cup
What is the minimum volume (in mL) of 5.96 M HCl needed to prepare 513.0 mL of dry chlorine when the gas is obtained at 28.6 degrees celcius and 763 torr
A synthesis gas analyzing 6.4% CO2, 0.2% O2, 40.0% CO, and 50.8% H2, (the balance is N2), is burned with 40% dry excess air. What is the composition of the flue gas
At 298 K and 1 bar pressure, the density of water is 1.00 , and C=75.3J K^-1 mol^-1. The change in volume with temperature is given by delta V=Vinitial*beta delta T , where beta, the coefficient of thermal expansion
If the mole fraction of the ethanol in the solution is 0.65, calculate its mole fraction in the vapor phase at this tempature.The vapor pressures of ethanol and 1-propanol are 108mmhg and 40 mmg respectively.
The jewelry contains only gold and silver, which have densities of 19.3 and 10.5 , respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in th..
Question- What is the molar mass of a compound if 5.12 grams is dissolved in 25.0 grams of chloroform solvent to form a solution that has a boiling point of 67.54 °C. The boiling point of pure chloroform is 61.70 °C and the boiling point elevation..
Calculate [H+1] for each of the following solutions and indicate whether the solution is acidic, basic or neutral.
calculate the concentration in molarity of a naoh solution if 30.0 ml of the solution are needed to neutralize 15.0 ml
a graduated cylinder contains 18.0 ml of water. what is the new water level after 35.6 g of silver metal with a density
a helium balloon is held at 1.2 atm of pressure and 300 K. If the pressure on the balloon increases to 4.2 atm, to what temperature must the balloon be heated , to maintain its same volume?
Write the PRODUCTS of the reaction, if there is a reaction in each case: a) KHCO3(aq) + HCl(aq) -->
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