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Question- You titrate a 10.00 mL sample of a solution of borax with HCl. If it requires 24.89 mL of 0.100 M HCl to reach the endpoint, calculate Ksp for borax.
Answer showing how to make each solution will get rated
Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is radioactive, with a half-life of 28.1 yr. Calculate how long it will take for 0.600 g of the isotope to be reduced to 0.310 g by decay.
ammonia nh3 kb 1.8 x 10-5 is added to 100 ml of water at room temperature. the vapor pressure of the water above the
A 20.0 ml sample of 0.200 M K2CO3 solution is 30.0 ml of 0.400 M Ba(NO3)2 solution. Barium Carbonate precipitates. The Concentration of barium ions, Ba^2+, in solution after reaction is?
The boiling point of a solution containing 10.44 g of an unknown nonelectrolyte in 50.00 g of acetic acid is 159.2°C. What is the molar mass of the solute?
A 4.61*10^-3 mole sample of HY is dissolved in enough H20 to form .086L of solution. If the pH of the solution is 2.64, what is the K_a of HY
What is the complete ionic and net ionic equation for : Pb (NO3)2 + K2CrO4 = KNO3 + PbCrO4
A sample of ethanol (C2H5OH) has a mass of 45.0 g. How many carbon atoms does the sample contain?
Where n is the quantum number with possible values of 1, 2.... as well as v is the frequency of vibration. The vibration frequency of HCL is approximately 8.85 *1013s-1. Explain what minimum energy is required to excite a vibration in HCL
If aqueous acetone (80% acetone, 20% h2o) is used as the extraction solvent instead of 100% acetone, the extraction yields of chlorophyll a and beta carotene
A 9 mL sample of a solution of AlBr3 was diluted with water to 25 mL. A 17 mL sample of the dilute solution was found to contain 0.042 moles of Br-. What was the concentration of AlBr3 in the original undiluted solution
Make 500g of 4.75% (w/w) aqueous ethanol. Explain what is the amount of EtOH to be measured. Explain what amount of water is required to make up this solution
A white solid, soluble in water and alcohol but not in toluene, does not melt when heated to 250°C. However, upon prolonged heating of the solid a colorless gas evolves and the amount of solid "shrinks". The solid appears in the list of pure subst..
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