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"Hard" water is hard because it contains Ca2+(aq) and Mg2+(aq) ions. It can be softened by adding borax powder, which is sodium tetraborate, Na2B4O7. Adding borax removes the Ca2+(aq) and Mg2+(aq) from solution. Write a net ionic equation for each of these two reactions. What ion replaces the Ca2+(aq) and Mg2+(aq) ions in the water?
If you have 4.63 g of caffeine dissolved in 69.9 mL of water and the extraction coefficient between H2O and CH2Cl2 is 21.51. How many grams of caffeine will extract into the CH22Cl2 layer if you use 62.9 mL
What mass of MgCl2 in grams must be added to 1.00 kg of water to prouce a solution that boils at 103.0 degrees celsius
Three gases (8.00 rm g of methane, CH_4, 18.0 g of ethane, C_2H_6, and an unknown amount of propane, C_3H_8) were added to the same 10.0 L container.
What can we say about the temperature change of a sample of water when the value of q is negative
The mass of a cube of iron is 379 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
when 0.514 g of biphenyl c12h10 undergoes combustion in a bomb calorimeter the temperature rises from 25.8 degc to 29.4
How much energy would be absorbed as heat by 75 g of iron when heated from 295 K to 301 K? (Cp for iron=0.449 J/g*C)
A buffer solution is made that is .412 M in CH3COOH and .412 M in CH3COOK. Write the net ionic equation for the reaction that occurs when .088 mol HI is added to 1.00L of the buffer solution. What is the pH of the buffer solution
Some water was added to the initial reaction mixture in the procedure you performed. a. How might the yield of 1-bromobutane be affected if the water were not added, and what product(s) would be favored
How many grams of P2O5 gas are present in a 750 ml container that is at 75 degrees C and at a pressure of 590 mm Hg?
How many valence electrons does one molecule of aspartame have? What are the bond angle measurements of aspartame?
What is the reaction rate when the concentration of HgCl2(aq) is 0.180 M and that of C2O42-(aq) is 0.281 M if the temperature is the same as that used to obtain the data shown above
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