Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
M L

M L.

Divider

Viewed Questions

Silver ion forms stepwise complexes with thiosulfate ion, $\mathrm{S}_{2} \mathrm{O}_{3}^{2-},$ with $K_{f 1}=6.6 \times 10^{8}$ and $K_{f 2}=4.4 \times 10^{4} .$ Calculate the equilibrium concentrations of all silver species for $0.0100 M$ $\mathrm{AgNO}_{3}$ in $1.00 \mathrm{M} \mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} .$ Neglect diverse ion effects.

Analytical Chemistry

Calcium ion forms a weak 1: 1 complex with nitrate ion with a formation constant of $2.0 .$ What would be the equilibrium concentrations of $\mathrm{Ca}^{2+}$ and $\mathrm{Ca}\left(\mathrm{NO}_{3}\right)^{+}$ in a solution prepared by adding $10 \mathrm{~mL}$ cach of $0.010 \mathrm{M} \mathrm{CaCl}_{2}$ and $2.0 \mathrm{M}$ NaNO $_{3}$ ? Neglect diverse ion effects.

Analytical Chemistry

Calcium ion forms a weak 1: 1 complex with nitrate ion with a formation constant of $2.0 .$ What would be the equilibrium concentrations of $\mathrm{Ca}^{2+}$ and $\mathrm{Ca}\left(\mathrm{NO}_{3}\right)^{+}$ in a solution prepared by adding $10 \mathrm{~mL}$ each of $0.010 \mathrm{M} \mathrm{CaCl}_{2}$ and $2.0 \mathrm{M} \mathrm{NaNO}_{3}$ ? Neglect diverse ion effects.

Analytical Chemistry

An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatographic (GC) method. The same sample is analyzed several times by both methods with the following results (\% ethanol). Enzymatic method: $13.1,12.7,12.6,13.3,13.3 .$ GC method: $13.5,13.3,13.0,12.9 .$ Does the enzymatic method give the same value as the GC method at the $95 \%$ confidence level?

Analytical Chemistry

Questions asked

INSTANT ANSWER

How to calculate the Cs(mol/L) ?

View Answer
 divider
INSTANT ANSWER

How to calculate the Cs(mol/L) ?

View Answer
 divider
INSTANT ANSWER

The subject of the experiment: Measuring the total hardness of water. Calculate the dosage (VEDTA). Repeat the measurement three times, calculate the total hardness.

View Answer
 divider
INSTANT ANSWER

Take the average value of the three measurements and calculate the concentration of the HCl sample.

View Answer
 divider
ANSWERED

David Collins verified

Numerade educator

| | 1 | 2 | 3 | | :--- | :---: | :---: | :---: | | $V_{ ext{HCl}}$ released (mL) | | 10.00 mL | | | $C_{ ext{NaOH}}$ (mol/L) | | 0.1025 | | | $V_{ ext{NaOH}}$ in the beginning (mL) | 0 | 0 | 0 | | $V_{ ext{NaOH}}$ at the endpoint (mL) | 10.50 | 10.68 | 10.80 | | $V_{ ext{NaOH}}$ used (mL) | ? | ? | ? | | The average used $V_{ ext{NaOH}}$ (mL) | | ? | | | The concentration of the sample $C_{ ext{HCl}}$ (mol/L) | | ? | |

View Answer
 divider
ANSWERED

David Collins verified

Numerade educator

| | 1 | 2 | 3 | | :--- | :--- | :--- | :--- | | V_{HCl} released (mL) | | 10.00 mL | | | C_{NaOH} (mol/L) | | 0.1025 | | | V_{NaOH} in the beginning (mL) | 0 | 0 | 0 | | V_{NaOH} at the endpoint (mL) | 10.50 | 10.68 | 10.80 | | V_{NaOH} used (mL) | ? | ? | ? | | The average used V_{NaOH} (mL) | | ? | | | The concentration of the sample C_{HCl} (mol/L) | | ? | |

View Answer
 divider
ANSWERED

Craig West verified

Numerade educator

11. ( lim _{x ightarrow-0.5^{-}} sqrt{frac{x+2}{x+1}} ) 12. ( lim _{x ightarrow 1^{+}} sqrt{frac{x-1}{x+2}} ) 13. ( lim _{x ightarrow-2^{+}}left(frac{x}{x+1} ight)left(frac{2 x+5}{x^{2}+x} ight) ) 14. ( lim _{x ightarrow 1^{-}}left(frac{1}{x+1} ight)left(frac{x+6}{x} ight)left(frac{3-x}{7} ight) ) 15. ( lim _{h ightarrow 0^{+}} frac{sqrt{h^{2}+4 h+5}-sqrt{5}}{h} ) 16. ( lim _{h ightarrow 0^{-}} frac{sqrt{6}-sqrt{5 h^{2}+11 h+6}}{h} ) 17. a. ( lim _{x ightarrow-2^{+}}(x+3) frac{|x+2|}{x+2} ) b. ( lim _{x ightarrow-2^{-}}(x+3) frac{|x+2|}{x+2} ) 18. a. ( lim _{x ightarrow 1^{+}} frac{sqrt{2 x}(x-1)}{|x-1|} ) b. ( lim _{x ightarrow 1^{-}} frac{sqrt{2 x}(x-1)}{|x-1|} )

View Answer
 divider
INSTANT ANSWER

Suggest mechanisms for these two reactions of the smallest aldehyde, formaldehyde (methanal \( \mathrm{CH}_{2}=\mathrm{O} \) ).

View Answer
 divider
ANSWERED

Grigoriy Sereda verified

Numerade educator

3. Predict the success or failure of these attempted substitutions at the carbonyl group. Of course, draw mechanisms.

View Answer
 divider
ANSWERED

Lainey Roebuck verified

Numerade educator

Questions 1) Why should the distillation apparatus have an opening to the atmosphere at the end? 2) Why the water through the condenser to be introduced is from down to up but not the opposite direction? 3) What is the boiling point? 4) Try to describe the characteristics of simple distillation and fractionation distillation separately.

View Answer
 divider