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(a) The following surface tension were measured for aqueous solutions of the nonionic surfactant
CH3(CH2)9(OCH2CH2)5OH at 25°C
C(10-4mol/dm-3) 0.1 0.3 1.0 2.0 5.0 8.0 10.0 20.0 30.0γ (mN/m) 63.9 56.2 47.2 41.6 34.0 30.3 29.8 29.6 29.5
Determine the critical micelle concentration and calculate the area occupied by each adsorbed surfactant molecule at the critical micelle concentration.
(b) The critical micelle concentration of nonionic surfactant in water varies with temperature as follows:
Temperature (oC) 15 20 25 30 40CMC (mmol/dm3) 21.9 20.8 19.9 19.1 17.8
Determine an enthalpy of micellization according to the phase separation model.
What is the pH of the solution when 50 grams of Ca(OH)2 was added to 1 liter of water? Ksp of Ca(OH)2 = 6.5 x 10^-6
Calculate the oxygen content of the plasma in mM! 1 ml plasma dissolves 24 uL oxygen at 38 degrees C if the partial pressure is 103 kPa.
What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 11.8 m/s when going down a slope for 3.61 s? (b) How far does the skier travel in this time
What is the concentration of all ions present in this strong electrolyte solution: 0.100mol of Ca(NO3)2 in 100.0ml of solution?
isotope 1 has a mass of 120.9038 rm amu and a relative abundance of 57.4 and isotope 2 has a mass of 122.9041 rm amu.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
The BaSo4 was found to have a mass of 11.96 mg. The molecular weight of the compound was found to be 168 g/mol. Using this data, what is the molecular formula of the C, H, S compound?
What is the morality of an unknown sulfuric acid solution if it takes 23.35 mL of a 0.3335 M lithium hydroxide solution to neutralize it?
All of the following reaction conditions would generally increase the rate of a chemical reaction, EXCEPT: A) changing the reactants from a liquid state to a gas state B) increasing the temperature of the reaction
If the age of the Earth is 4.5 billion years and the half-life of 40K is 1.26 billion years, what percent of the Earth's original amount of 40K remains today
Need help with this question: Calculate the heat needeed at 0 degreess C to make each of the fallowing changes of state, indicate weather heat s absorbed or released. 1.) how many calories does it take to freeze 35g of water
One liter of a buffer solution is prepared by dissolving 0.115 mol of NaNO2 and 0.070 mol of HCl in water. What is the pH of this solution? If the solution is diluted two fold with water, what is the pH?
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