Dissolving solution question. CHEM 20?
Dissolving a substance can be achieved through dissociation, ionization, or dispersion.? Which manner of dissolving occurs to each of the following substances? (These are the answer I think, but I want to be sure.) a. acetic acid (Ionization) b. methanol (Dispersion) c. copper(II) sulfate (Dissociaton) Please help. I am so confused! :(
A solution prepared by dissolving 0.600 grams...?
A solution prepared by dissolving 0.600 grams of Michiganotine (a nonelectrolyte) in water to make 12.0 mL of solution has an osmotic pressure of 7.55 atm at 25.0 degree C. R = 0.0821 L atm/K mol a. Determine the molecular mass of Michiganotine? b. What is molality(m)of the solution, given that the density of the solution is 0.9875 g/mL
Chem 20: solution questions *answer the ones you know!*?
You don't need to answer all of them. Just the ones you know. The more the better! thanks! A solution is prepared by dissolving 5.24 g of sodium hydroxide pellets, NaOH, in distilled water to form 2.40L of solution. Determine the molar concentration, M, of this solution 2. A student dissolves 4.20 x 10^4 of lead (II) chloride, PbCl2, in distilled water to form 20.0ml of solution. Calculate the Molarity, M, of this solution in mol/L 3. What volume in litres of a 0.250 M NaCl solution would contain 0.420 moles of NaCl 5. what mass in grams is required to prepare 2.40L of a 0.0600 M NaClO3 solution 6. a student prepares a 0.500 M solution of lithium phosphate, Li3,PO4 in distilled water a) write a dissociation equation for this reaction b) determine the [Li+] in mol/L c)determine the [PO4^3] 7. complete the following dissociation equations a) KBr(s) ---> b)AuCl3(s)---> c)Co(OH)2(s)---> d)Ga2(SO4)3(s)---> 8. write an equation to represent the dissolving of the ionic solid, Na2S, in water. If the concentraion of a sodium sulfide solution, Na2S(aq) is known to be 0.0800 M, then determine the [Na+] and [S2-] in the solution
A solution of 20 PPM of a substance (A) dissolved in another substance (B). How do you calculate the mass percentage of A and B?
Parts per mass is defined as the mass solute divided by mass solution, usually multiplied by a factor. PPM denotes that the multiplication factor is 10^6. Mass percent denotes that the multiplication factor is 100. So divide by 10^6 and multiply by 100, or just divide by 10^4.
Finding molarity in a diluted solution? CHEM, NEED HELP.?
A standard solution is prepared for the analysis of fluoxymesterone (C20H29FO3), an anabolic steroid. A stock solution is first prepared by dissolving 10.0 mg of fluoxymesterone in enough water to give a total volume of 500.0 mL. A 100.0 microliter aliquot (portion) of this solution is diluted to a final volume of 100.0 mL. Calculate the concentration of the final solution in terms of molarity.
Is dissolving CuSo4 in H2O a chemical or physical reaction?
I answered this question before. Here again,Dissolution of unhydrous CuSO4 (white amorphous powder) in water will form complex ion [Cu(H2O)6]^2+, and sulfate anion. It should be counted as a chemical change.Dissolution of hydrate [Cu(H2O)6]SO4 (blue crystal) in water separates the cation [Cu(H2O)6]^2+, and anion. There is no chemical bond change. So it is a physical change.
If 3.13 g of CuNO3 is dissolved in water to make a 0.750 M solution, what is the volume of the solution?
This homework question is solved with the following steps:Calculate or look up the molar mass of the compounds involved (gram/mol)Using the given quantity and the molar mass, calculate how many moles you have available. [mol = gram / (gram/mol)]Using the quantity in mol and the given concentration, calculate the volume [liter = mol / (mol/liter)]As you can see from the way I have written these steps, you can generally find out such calculation proces steps by looking at the units of what you have and what you need.
At 20 degrees C, a saturated solution of NaNo3... chem help!?
To solve this problem, you must have a Solubility Graph (or make one from experimental data). At 50 °C, about 115 grams of Sodium Nitrate must be dissolved to saturate a water solution. Since you report that 88 grams are dissolved in 100 mL of water at 20 °C, then 115 grams - 88 grams = 27 grams must be added.
Chemistry question. If salt is added to water and then the water is evaporated I know the water turns into a gas but what does the salt turn into. Liquid, gas, solid?
Salt remains to be- salt (NaCl). Water evaporates after~100 degree but the dissolved salt remains as solid salt. There was even an experiment where we had to separate salt from a solution in class 4.Salt is most abundant in sea water. It is produced by evaporating sea water. It is the best example for your answer. Look at the salt that you are using- that very thing came after evaporation.