Answer:
yes it is
Explanation:
b bc it is i did the test
Answer:
71%
Explanation:
Theoretical Yield = 24
Actual Yield = 17
(Actual Yield/Theoretical Yield)*100% = (17/24)*100% ≈ 71%
Explanation:
The purpose of this seven-page lab report is to use simple and fractional distillation to purify volatile liquids. The boiling points were obtained from the distillate collected drops and the efficiency of the two methods of purification were compared. The introduction experiment, data, conclusion
1. NaCl
formula weight - 58,4 g/mol.
number of moles - 0,14 mol
mass - 58,4 g/mol · 0,14 mol = 8,176 g.
2. KCl
formula weight - 74,55 g/mol.
number of moles - 0,005 mol
mass - 0,372 g.
3. C₆H₁₂O₆
formula weight - 180,1 g/mol.
number of moles - 0,0056 mol
mass - 180,1g/mol · 0,0056 mol = 1,01 g.
4. NaHCO₃
formula weight - 84 g/mol.
number of moles - 0,0262 mol
mass - 2,2 g.
5. CaCl₂·H₂O
formula weight - 147 g/mol.
number of moles - 0,001 mol
mass - 0,15 g.
6. MgSO₄
formula weight - 120,3 g/mol.
number of moles - 0,0008 mol
mass - 0,096 g.
7. NaH₂PO₄·H₂O
formula weight - 138 g/mol.
number of moles - 0,001 mol
mass - 0,14 g.
Explanation:
a) The presence of sulfate ions in a solution can be confirmed by the reaction of barium chloride in an acidic medium.
The balanced chemical equation of the reaction is shown below:
Hence, the white precipitate is barium sulfate and its formation with the ionic equation is shown below:
b) The presence of copper (II) ions can be confirmed by the following test:
Add potassium iodide solution to copper (II) solution.
Then a white ppt of cuprous iodide along with the liberation of iodine is observed and the entire solution attains brown color.
The chemical equation of the reaction is shown below:
c)(i)Due to this reaction, the blue color of the solution becomes white.
Reddish-brown copper is deposited at the bottom of the container.
(ii)In this reaction, zinc is oxidized.
d) (i) Copper is produced at the cathode.
(ii)
(iii) The reaction that takes place at the cathode is reduction.
Reduction is gaining of electrons.