
If 1.421 g of Na_2SO_4 is dissolved in sufficient water to make 100.0 mL of solution,...
6.3145 g of NaCl was dissolved in enough water to make 100.0 mL of solution. If you pipet a 25.00 mL portion of this solution to an evaporating dish, and evaporate off the water to dryness, what mass of NaCl would you expect to collect?
If 2.50 g of calcium bromide, CaBr2, is dissolved in enough water to make 250 mL of solution, what is the concentration of bromide ions? (Molar mass of CaBr2: 199.9 g/mol) 0.100 M 0.150 M 0.0500 M 0.0125 M 0.0250 M
5.0 g of solid Al(NO3)3 was added to enough water to make a 100.0 mL solution. Al(NO3)3 is very soluble in water. 1. Write out the dissolution reaction that occurs when the solid Al(NO3)3 was added to water. 2. What is the concentration, in Molarity, of Al(NO3)3 once it is dissolved in the water? 3. If 53 mL of water was added to the original Al(NO3)3 solution described above, what is the new concentration in Molarity? 4. What is the...
a. A student dissolved 20.00 g of Na2SO4 in enough water to make 250 mL of stock solution. How many mL of the stock solution would the student need to use in order to make a 150 mL of 0.100 M solution? b. In an acid-base titration, 82.56 mL of 0.175 M NaOH titrant reacts with 100.0 mL of an unknown concentration of HCl solution. What is the density of the HCl solution?
A 4.75-g sample of an unknown compound is dissolved in enough water to make 100.0 mL of solution. This solution has an osmotic pressure of 25.0 torr at 25oC. Find the molar mass of the unknown.
A student dissolved 4.00 g of Co(NO_3)_2 in enough water to make 100.0 mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275 mL of a final solution. How many grams of NO^-_3 ion are there in the final solution?
When 10.0 mg of sucrose is dissolved in enough water to make 100.0 mL of solution at 25.00 °C, an osmotic pressure of 5.43 mmHg is measured. What is the molar mass of sucrose? Show your work, and provide your answer in g/mol.
student mixes 39.0 mL of 3.32M Pb(NO_3)_2(aq) with 20.0 mL of 0.00223 M Na_2SO_4(aq). How many moles of PbSO_4(s) precipitate from the resulting solution? K_sp[PbSO_4(s)] = 2.5 times 10^-8 M^2 What are the values of [Pb^+2], [SO_4^2-], [NO_3^-], and [Na^+] after the solution has reached equilibrium at 25degreeC? [Pb^+2] = [SO_4^2-]= [NO_3^-]= [Na^+]=
A 4.36-g sample of an unknown alkali metal hydroxide is dissolved in 100.0 mL of water. An acid-base indicator is added and the resulting solution is titrated with 2.50 M HCl(aq)solution. The indicator changes color signaling that the equivalence point has been reached after 17.0 mL of the hydrochloric acid solution has been added. Part B What is the identity of the alkali metal cation: Li+, Na+, K+, Rb+, or Cs+? Li+ Na+ K+ Rb+ Cs+ Part A What is...
If 2.63 g Fe(NO3), is dissolved in enough water to make exactly 460 mL of solution, what is the molar concentration of nitrate ion? M of Fe(NO3)3=241.86 g/mole