Questions
Balance the following oxidation–reduction equation. The reactions occur in a basic aqueous solution. Cd2++ H  2S →  Cd...

Balance the following oxidation–reduction equation. The reactions occur in a basic aqueous solution.

Cd2++ H  2S →  Cd + S  8

S2- + F2 → SO42- + F-

Cr + NO3-Cr(OH)4- + NH3

MnO4- + C2O42-MnO2 + CO2

In: Chemistry

a)What is the pH of a solution prepared by adding 25.00 ml of 0.0993 M sodium...

a)What is the pH of a solution prepared by adding 25.00 ml of 0.0993 M sodium hydroxide to 30.00 mL of 0.0553 M acetic acid? There will be a reaction. What two major species remain and how much of each?

b) What is the pH of 9.93x10^-8 M potassium hydroxide?

c) What is the volume of 0.579 M sodium hydroxide required to reach the equivalence point of a titration of 10.0 mL of 5.00% (by mass) acetic acid?

d) What is the pH at the equivalence point in the titration above?

*Please show steps to understand completely*

In: Chemistry

Solve an equilibrium problem (using an ICE table) to calculate the pH of each of the...

Solve an equilibrium problem (using an ICE table) to calculate the pH of each of the following solutions.

A. a mixture that is 0.15M in HF and 0.15M in NaF
B.0.15M NaF
C. 0.15M HF





In: Chemistry

Formic acid (HCO2H) is an organic acid secreted by ants and stinging nettles. Calculate the pH...

Formic acid (HCO2H) is an organic acid secreted by ants and stinging nettles.

Calculate the pH in 0.21M HCO2H (Ka=1.8

In: Chemistry

at 25 C, a solution is prepared by adding 50 ml of 0.2 M NaOH to...

at 25 C, a solution is prepared by adding 50 ml of 0.2 M NaOH to 75 ml of 0.1 M NaOH. What is the total concentratoin of hydorxide ion in the solution? Assume volumes are additive.

In: Chemistry

a hydrogen atom in the ground state absorbs a photon of light with a wavelength of...

a hydrogen atom in the ground state absorbs a photon of light with a wavelength of 97.3nm causing the electron to jump to an unknown energy level. the electron then relaxes emitting a photon of light in the visible range, what is the wavelength of the emitted photon?

In: Chemistry

Write the dissociation reaction for the following acids in water H2O. State whether the acid is...

Write the dissociation reaction for the following acids in water H2O. State whether the acid is a strong acid or a weak acid. Is the reaction reversible? Identify the acid, base, conjugate acid, and conjugate base.

State the Dissociation reaction, Strong or Weak Acid, Is it reversable, Acid, Base, Conjugate Acid, Conjugate Base for each. PLEASE SHOW WORK, AND EXPLAIN.

1. H2CO3

2.HCI

3. HNO3

4. Write the equation that represents the reaction of hydrochloric acid in water.

Conjugate acid-base pair that includes hydrochloric acid:

Conjugate acid-base pair that does not include hydrochloric acid:

Does water act as an acid or a base in this reaction?

In: Chemistry

2H2S(g)<---> 2H2(g) + S2(g) The value of Kc for the thermal decomposition of hydrogen sulfide is...

2H2S(g)<---> 2H2(g) + S2(g)

The value of Kc for the thermal decomposition of hydrogen sulfide is 2.2x10^-4 at 1400 K. A sample of gas which [H2S]=4.60 M is heated to 1400 K in a sealed vessel. After chemical equilibrium has been achieved, what is the value of [H2S] in M? Assume no H2 or S2 was present in the original sample.

In: Chemistry

A pediatrician orders Cephalexin 12.5 mg/ kg by mouth (po) every 12 hours (bid). The child...

A pediatrician orders Cephalexin 12.5 mg/ kg by mouth (po) every 12 hours (bid). The child weighs 33 pounds (lbs). The pharmacist provides you with Cephalexin oral suspension 100 mg/mL. How many milliliters (mL) of Cephalexin will you administer bid? (1 kg = 2.2 lbs) HLEP! I NEED ANSWER ASAP!

In: Chemistry

Consider the dissociaton of methane, into the elements H2g and C(s) given a) the change of...

Consider the dissociaton of methane, into the elements H2g and C(s) given

a) the change of enthalpy of reaction is -74.85 kJ/mol and change of entropyof reaction is -80.67 J/mol K at 298K. Calculate the Keq at 298K.

b) Assuming that change in enthalpy of formation is independent of temperature, calculate K at 323K.

c) Calculate the degree of dissociation of methane at 298K and Ptotal at 0.01 bar.

In: Chemistry

Using 1.8*10^-5 for the Ka for acetic acid, along with the weight of sodium acetate and...

Using 1.8*10^-5 for the Ka for acetic acid, along with the weight of sodium acetate and volume of acetic acid used to prepare a buffer, calculate the expected pH of the buffer.

So the weight is 4.0089 g and the volume is 100mL

In: Chemistry

Many different ways have been proposed to make batteries. One cell is set up with copper...

Many different ways have been proposed to make batteries. One cell is set up with copper and lead electrodes in contact with CuSO4(aq) and Pb(NO3)2 (aq), respectively. If the Pb2+ and Cu2+ concentrations are each 1.0 M, what is the overall cell potential?

Pb2+ + 2e- ---> Pb E = -0.22 V

Cu2+ + 2e- ----> Cu E = +0.34 V

answer: 0.56 V. how?

In: Chemistry

Q.N.2) A portion of a specicific DNA molecule consists of the following sequence of nucleotide triplets:...

Q.N.2) A portion of a specicific DNA molecule consists of the following sequence of nucleotide triplets:

TAC   GAA    CTT  CGG

What is the DNA sequence codes for this terapeptide?

In: Chemistry

. Consider the following reduction-oxidation “skeleton” equation, Br2(l) = BrO3 ‒ (aq) + Br‒ (aq) a....

. Consider the following reduction-oxidation “skeleton” equation,

Br2(l) = BrO3 ‒ (aq) + Br‒ (aq)

a. Write a balanced equation for the reduction-oxidation reaction that occurs in basic solution.

b. Using your balanced equation, identify the chemical species that is: (1) oxidized, (2) reduced, (3) the reducing agent, and (4) the oxidizing agent.

In: Chemistry

How many oxygen atoms are present in 373 g of mannose, C6H12O6?

How many oxygen atoms are present in 373 g of mannose, C6H12O6?

In: Chemistry