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Which of the following statements are correct based on the voltaic cell represented below
Ni(s)INi2+(1.0M)II Fe3+(0.10M)IFe2+(1.0M) I Pt(s)
a. Pt is the inert electrodes and has a negative polarity
b. The voltaic cell uses salt bridge
c. Electrons flows from Ni toward Pt in the external wire
d. The emf is greater than 1.0 volt
e. Ni is the anode and has a positive polarity
The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.300 M NaOH. B. What was the initial concentration of HCl?
An ionic compound forms when aluminum (Z = 13) reacts with iodine (Z = 53). If a sample of the compound contains 1.23 x 1019 aluminum ions.
An appropriate indicator is used. Ka for acetic acid is 1.7x10^-5. Calculate the pH in the flask after 300 mL of 0.100 M NaOH has been added
The pH of the resulting solution is 6.35. Calculate the Ka for the acid.
3.10 percent of the Br2 undergoes dissociation. Calculate the equilibrium constant Kc for the reaction.
The reaction SiH4 --> Si + 2H2 has a k= 0.048M/min at 500 degrees Celsius and k= 49.0M/sec at 700 degrees celsius.
A 391-rm mL sample of unknown rm HCl solution reacts completely with rm Na_2CO_3 to form 20.1 g rm CO_2. What was the concentration of the rm HCl solution?
Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water: C6H5COOH C6H5COO- + H+
Calculate the volume of 0.460 M radium hydroxide solution required to completely neutralize 10.00 mL of 1.17 M phosphoric acid
A syringe containing 1.64mL of oxygen gas is cooled from 95.9°C to 0.8°C. What is the final volume of oxygen gas?
the reaction conditions are influencing the directing effect of the -NH2 group. Explain why this occurs, using both words and structures.
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium chloride solution, water, and carbon dioxide. What is the percent yield of carbon dioxide
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