10.0 mL of NaOH solution with unknown concentration is titrated with 0.10 M of HCl solution in the presence of phenolphthalein indicator. At the end of the titration 15.0 mL of HCl solution is used. What is the number of millimoles and concentration of NaOH solution used? A. 1.5 mmol and 0.15 M NaOH B. 1.0 mmol and 0.15 M NaOH C. 1.5 mmol and 0.1 M NaOH D. 2.0 mmol and 0.1 M NaOH E. 1.0 mmol and 0.1 M NaOH

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10.0 mL of NaOH solution with unknown concentration is titrated with 0.10 M of HCl solution in the
presence of phenolphthalein indicator. At the end of the titration 15.0 mL of HCl solution is used.
What is the number of millimoles and concentration of NaOH solution used?
A. 1.5 mmol and 0.15 M NaOH
B. 1.0 mmol and 0.15 M NAOH
C. 1.5 mmol and 0.1 M NaOH
D. 2.0 mmol and 0.1 M NaOH
E. 1.0 mmol and 0.1 M NaOH
Which of the following statements is false for the reactions given below:
Cr* + Sn4+ → Cr³+ + Sn²+
2As(s) + 3C2(g) → 2ASCI3
3Hg2+ + 2Fe(s) → 3Hg2 + 2FE3+
A. Sn+4 is reduced.
B. As gains electrons.
C. Cr* → Cr3+ half reaction takes place in the anode.
D. As(s) is oxidized.
E. Hg2+ → Hg2 half reaction takes place in the cathode.
Transcribed Image Text:10.0 mL of NaOH solution with unknown concentration is titrated with 0.10 M of HCl solution in the presence of phenolphthalein indicator. At the end of the titration 15.0 mL of HCl solution is used. What is the number of millimoles and concentration of NaOH solution used? A. 1.5 mmol and 0.15 M NaOH B. 1.0 mmol and 0.15 M NAOH C. 1.5 mmol and 0.1 M NaOH D. 2.0 mmol and 0.1 M NaOH E. 1.0 mmol and 0.1 M NaOH Which of the following statements is false for the reactions given below: Cr* + Sn4+ → Cr³+ + Sn²+ 2As(s) + 3C2(g) → 2ASCI3 3Hg2+ + 2Fe(s) → 3Hg2 + 2FE3+ A. Sn+4 is reduced. B. As gains electrons. C. Cr* → Cr3+ half reaction takes place in the anode. D. As(s) is oxidized. E. Hg2+ → Hg2 half reaction takes place in the cathode.
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