A 0.218 g sample of impure magnesium hydroxide
(Mg(OH)2, 58.32g/mol) was dissolved in 50.00 mL
of 0.120 M HCI. Back-titration of the excess acid
required 3.76 mL of 0.095 M NaOH. Calculate the
%purity of the Mg(OH)2
Mg(OH)2 + 2HCl β MgCl2 + 2H2O
HCI + NaOH β NaCl + H2O
A. 75.5%
B. 5. 13%
C. 0.16%
D.0.218%β
Answers: 2
Chemistry, 22.06.2019 13:50
Abeaker with 2.00Γ102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.
Answers: 1
Chemistry, 22.06.2019 22:20
How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.
Answers: 2
A 0.218 g sample of impure magnesium hydroxide
(Mg(OH)2, 58.32g/mol) was dissolved in 50.00 mL
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