Reference no: EM13245176
In the titration of a solution of the extremely weak acid, HCN (Ka = 6.2 x 10-10), by a solution of sodium hydroxide of equal concentration, which of the following statements is true?
a. The equivalence point will occur at an acidic pH, and a suitable indicator would be one like alizarin that changes color between pH of 6 and about 7
b. The equivalence point will occur at a neutral pH, and a suitable indicator would be one like bromthymol blue that changes color between pH of 6 and about 7.5
c. The equivalence point will occur at a basic pH, and a suitable indicator would be one like bromthymol blue that changes color between pH of 6 and about 7.5
d. The equivalence point will occur at a basic pH, and a suitable indicator would be one like phenol red that changes color between pH of 7 and about 8
e. The equivalence point will occur at a basic pH, and a suitable indicator would be one like phenolphthalein that changes color between pH of 8 and about 11.
|
Explain the fomulas of the possible compounds thallium
: Thallium and indium form +1 and +3 oxidation states when in compounds. Predict the fomulas of the possible compounds between thallium and oxygen and between indium and chlorine. Name the compounds
|
|
What assumption will be required
: State the appropriate null and alternative hypothesis for testing the standard regarding the mean value. Test the hypothesis using a significance level equal to 0.05. What assumption will be required?
|
|
What is the wavelength of the light in the water
: Light of wavelength 420 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33, What is the wavelength of the light in the water
|
|
What should be the new price which can achieve the goal
: The federal government estimated that the elasticity of demand for cigarettes among teenagers is equal to 2. If they want to reduce smoking by 50% among this group and the price of cigarettes is $6.00 per pack,
|
|
Explain titration of a solution of the extremely weak acid
: In the titration of a solution of the extremely weak acid, HCN (Ka = 6.2 x 10-10), by a solution of sodium hydroxide of equal concentration,
|
|
What is the difference (r+)-(r-) between the two rates,
: An unstable elementary particle comes in two varieties, one with positive and one with negative electric charge, What is the difference (R+)-(R-) between the two rates, with its error
|
|
Explain how the gasoline has an inelastic demand
: The mayor of Wappingers Falls was told by your Microeconomics class that gasoline has an inelastic demand and raising the price of an inelastic product raises revenue. The mayor wants to raise town revenues and decides to raise taxes
|
|
What is the current i
: Two insulated wires, each 2.94 m long, are taped together to form a two-wire unit that is 2.94 m long. One wire carries a current of 8.36 A, What is the current I
|
|
Who will pay each for the commuter service
: Jane quit her job at IBM where she earned $50,000 a year. She cashed in $50,000 in corporate bonds that earned 10% interest annually to buy a mini-bus. Jane has decided to buy the mini-bus and set up a commuter service
|