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1. Suppose it takes 33.69mL OF 0.005123 M EDTA to titrate 25.00mL of hard water solution
a) What is the concentration expressed as molarity of Ca2+ of hard water ions in the solution?
b) If the metal ions in the hard water all came from CacO3, how many grams of CaCO3 would be in 1.000L of the solution (in other words, determine g CaCo3/L)
C) Convert g CaCO3/L calculated in (b) to mg CaCO3/L. (This is equivalent to ppm)
2. Rank the following alkal iearth metals in their order of solubility starting from the highest. Ba2+,CA2+.Mg2+, Sr2+.How does this trend compare with the order of the alkaline earth metals on the periodic table?
Determine the activation energy for diffusing copper into gold if you know that the diffusion coefficient is 3.98 x 10-13 m2/s at 980 oC and the diffusion coefficient is 3.55 x 10-16 m2/s at 650oC.
consider a major oil spill in a lake a prototyperelated to alaska oil spill few years ago and many subsequentspills.
write a balance chemical equation for the combustion of 1 mol glycerin, and calculate delta H for this reaction at 298K if burning 1 mol glycerin has a delta E of -54.6 kj
The vapor pressure of ethanol at 34.7 ºC is 100.0 mm Hg as well as the heat of vaporization of ethanol is? Hvap=38.6kJ/mol. Explain what is the vapor pressure of ethanol in mm Hg at 65.0 ºC
What region of the C13 NMR spectrum would you find a resonance for the carbonyl group of an aliphatic ketone
How many photons are required to heat 275 mL of coffee from 25.0 C to 62.0 C. Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 J/(g K), as water over this temperature range. Express the number of photons n..
Calculate the initial effusion rate. If this rate continued how much time would pass until the pressure dropped to 0.90 bar? (actually the rate changes with pressure- indicated why using the equations). assume values for nitrogen
How much heat is required to raise the temperature of 42.5 g of water from its melting point to its boiling point? Express your answer numerically in kilojoules.
Assume the total heat capacity of the air C air=30 J/K. Describe what's the likely ice will ne after the system reaches equilibrium. b) Estimate theliekly final temperature after reaching equilibrium
If a solution contains 0.60 mol of OH^-, how many moles of H^+ would be required to reach the equivalence point in a titration?
Assign oxidation numbers to all the elements in the following reaction and identify the oxidizing and reducing agents. HNO3+ I2--->HIO3+NO2+H2O
Calculate the percent by mass of aluminum in the sample. The vapor pressure of water at 20 degree C is 17.5 Torr.
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