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Consider a buffer solution that contains 0.35 M NaHCO3 and 0.25 M Na2CO3. pKa(HCO3--)=10.33.
a) Calculate its pH.
b) Calculate the change in pH if 0.130 g of solid NaOH is added to 170 mL of this solution.
c) If the is ±0.10 pH units, calculate how many moles of H3O+ can be neutralized by 250 mL of the initial buffer. acceptable buffer range of the solution
Diphosphorus pentoxide(3.54g) has reacted with ferric oxide(5.45g).What is/are the mass/masses of the product/s obtained per reaction assuming 100%yield
If there is no such evidence, then we have no reason to believe in witches. If there is evidence, we do have reason to believe in witches. There is no such evidence. Therefore we have no reasons to believe in witches.
A buffer solution is prepared by adding 0.20 mole of ammonia and 0.30 mole of ammonium chloride to enough water to make one liter of solution. Ka = 5.7 x 10-10 for ammonium.
Question- Given heats of formation of solid and aqueous KHT as (-1545 kJ/mol) and (-1497 kJ/mol) respectively, calculate pH of solution for KHT
A) aqueous naoh and ch3ch2co2h B) aqeous naoh and c6h5so3h c) ch3ch2Li in hexane and ethyne d) ch3ch2Li in hexane and ethyl alcohol
a specific heat of 0.061 cal/g C and at a temp of 99.1C is added to 85.0 grams of water at 23.5C What will be the final temp of the water when equilibrium is reached?
Compute the density of dry air and molar mass at zero degree Celsius temperature and 1.0 atm of pressure.
A student wants to determine the density of a plastic piece. Preliminary experiments indicate that the density of the plastic is greater than 0.85 g/ml, but less dense than water. In order to determine the density of the plastic piece, the student wi..
A solution contained KIO3 and excess KI. 25 cm3 of this solution were acidified and the liberated I2 required 26.8 cm3 of 0.1 M Na2S2O3 for complete recaction.
The second-order rate constant for the decomposition of nitrous oxide (N2O) into a nitrogen molecule and oxygen atom has been measured at different temperatures given below.
question what is the rate of the following reaction ms if the rate constant for the reaction is 0.800 lbullmol-1bulls-1
Zinc may be directly leached from zinc-lead sulphide concentrates by reaction with sulphuric PbS(s) + H2SO4 + 1 O2(g) → PbSO4(solid) + S° + H2O 21
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