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What would you expect to happen to the absorbance reading of a spectrophotometer if the pathlength of the cuvette increased from 1 cm to 2 cm based on Beer’s Law?

I used 23.4 mL of a 0.015 M EDTA solution to reach the endpoint of my titration of tap water. If I started with 650.0 mL of water, how many ppm of CaCO3 is present in the sample of tap water? Give the molar mass of CaCO3 is 100.09 g/mol.

For the following reaction, Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s), calculate the emf at 25 °C with a [Zn(NO3)2] = 0.050 M and [Cu(NO3)2] = 5.00 M given the E° = 1.1 V, R = 8.314 J/K-mol, and F = 96,485 J/V-mol.

For the reaction Fe3+(aq) + Co2+(aq) → Fe2+(aq) + Co3+(aq), what is the reducing agent?

A voltaic cell has a silver bar as the cathode with a solution containing AgNO3 surrounding the cathode. It has a copper bar as the anode with a solution containing Cu(NO3)2 surrounding the anode. The salt bridge is KCl. Where will the K+ migrate to keep electrical neutrality?

For the reaction Fe3+(aq) + Co2+(aq) → Fe2+(aq) + Co3+(aq), what is reduced?

Which of the following equations is the balanced reduction half reaction for Ag+(aq) + Fe(s) → Fe2+(aq) + Ag(s)?

Assuming standard conditions, arrange the following in order of increasing strength as reducing agents in acidic solution: Cu2+, Cl2, O2.

What is the oxidation of a pure element?

In the reaction I2O3(s) + 5CO(g) → I2(s) + 5CO2(g), which element undergoes a change of 2 in its oxidation number (could be +2 or -2)?