Calculate percent yield of acetanilidae if you started with 2 mL of aniline and 2 mL of acetic anhydride and obtained only 1.5 grams of acetanilidae. Show detailed work indicating what is the limiting reagent and theoretical tield, etc.
In: Chemistry
What is the pH of a 2.75 x 10-3 M solution of potassium fluoride, KF, in water? The Ka for hydrofluoric acid is 3.55 x 10-5.
please show steps!!
the answer is 7.94
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What is the cobalt (II) ion concentration in a solution prepared by mixing 431 mL of 0.444 M cobalt (II) nitrate with 419 mL of 0.276 M sodium hydroxide? The Ksp of cobalt (II) hydroxide is 1.3 × 10-15
In: Chemistry
1.) A.) CTP stablizes the R or T state? (pick one) of aspartate carbamoyl transferase (ACTase) and acts as a:
a.) positive regulator b.) negative regulator c.) a co-factor d.) competitive inhibitor
B.) regulation of ACTase results in equal numbers of synthesized purines and pyrimidines. explain how this occurs.
C.) What would be the shape of the michaelis-menten curve for this enzyme (like parabolic, sigmoidal,etc)?
In: Chemistry
Cation Group III Quantitative Analysis Lab?
We just completed our unknown lab, where we are given a test tube with some of the Group III cations (Zn, Cr, Mn, Fe, Al, Ni, Co, and we dont know which are present) and we need to write a discussion about certain chemical concepts, and I am stuck on some.
http://web.cerritos.edu/cshimazu/SitePages/Chem%20112/112%20Experiments/5%20Cation%20III%20Part%20B/Cation%20III%20Part%20B.pdf
(That is the lab handout in case I don't make sense)
So we need to write about equilibrium, and explain it using Le Chatalier's principle and give examples
We can talk about complex ions, like why do some form complex ions and others do not?
Whey do cation III group ions form a hydroxide precipitate in the first place?
Discuss buffers. The buffers we used were NaBiO3, we used it when the solution was acidic , how do they work and why are they important?
In: Chemistry
Draw line structures corresponding to each name below
1. (3E)-3,7-dimethyl-1,3,6-octatriene
2. 3,6-dimethyl-1,4-cyclohexadiene
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Assume you wanted to end up with 38.0 g of copper from the reaction below. What mass of copper (II) sulfate would be required?
Fe + CuSO4-------> Cu + FeSO4
In: Chemistry
Data Table 1. Butane.
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Question |
Answer |
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Are the models isomers? |
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Bond angles and molecular geometry |
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Describe the experience trying to rotate a double bond |
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Bond angles and molecular geometry of the 2 center carbon atoms of cis-2-butene |
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Is it possible to convert between cis-2-butene and trans-2-butene without breaking bonds? |
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Why are cis-2-butene and trans-2-butene referred to as geometric isomers? |
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Define the term structural isomer and explain how it differs from a geometric isomer. |
In: Chemistry
A 35.00 mL solution of 0.25M HF is titrated with a standardized 0.1316M solution of NaOH at 25C.
a.What is the PH of the HF solution before titrant is added?
b.How many milliliters of titrant are required to reach the equivalence point?
c.What is the PH at 0.5ml before the equivalence point?
d.What is the PH at the equivalence point?
e.What is the PH at 0.5 ml after the equivalence point?
In: Chemistry
I got the answer for part A right but I can't seem to get part B or C. Could you please show me working out? Thank you!
Part A
What is the pH of a buffer prepared by adding 0.506mol of the weak acid HA to 0.609mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66
In: Chemistry
1.What mode of decay is probable for 41/18 Ar ? What mode of decay is probable for ? a.electron capture b. beta emission C.positron emission D.alpha emission
2.
The standard cell potential, E°cell, for a reaction in which two electrons are transferred between the reactants is +1.33 V. Calculate the standard free energy change, ΔG°, in kJ for this reaction and determine if it is spontaneous or nonspontaneous at 25°C.
A.−2.57 × 102 kJ, nonspontaneous B. −2.57 × 102 kJ, spontaneous C. −1.28 × 102 kJ, spontaneous D. +2.57 × 102 kJ, nonspontaneous
3. List the given metal ions in order of increasing strength as oxidizing agents, based on the following standard reduction potentials, E°red .
| A. | Al3+ < Fe2+ < Zn2+ < Ag+ |
| B. | Ag+ < Fe2+ < Zn2+ < Al3+ |
| C. | Zn2+ < Fe2+ < Ag+ < Al3+ |
| D. | Al3+ < Zn2+ < Fe2+ < Ag+ |
In: Chemistry
How much heat (in kJ) is required to warm 13.0 g of ice, initially at -13.0 ∘C, to steam at 114.0 ∘C? The heat capacity of ice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C.
In: Chemistry
Calculate the pH of an aqueous solution of 0.225 M salicylic acid, which has a Ka =1.0 x 10^-3
An explanation will be appreciated, a simple answer won't really help. Thank you!
In: Chemistry
Write equations for the reactions investigated. Label Sn1 or Sn2.
1)Butyl bromide in 15%NaI-acetone
2)Butyl bromide in 1%ethanolic silver nitrate
?????3)Butyl chloride in 15% NaI-acetone
4) Butyl chloride in 1% ethanolic silver nitrate
5)Sec-butyl chloride in 15%NaI-acetone
6) Sec-butyl chloride in 1% ethanolic silver nitrate
7) Tert-butyl chloride in 15%NaI-acetone
8) Tert-butyl chloride in 1% ethanolic silver nitrate
9) Crotyl chloride in 15% NaI-acetone
10) Crotyl chloride in 1% ethanolic silver nitrate
Any help would be appreciated! I will rate your response in return!
In: Chemistry
Consider the titration of a 25.0 −mL sample of 0.180 M CH3NH2 with 0.155 M HBr. Determine each of the following.
A. initial pH
B. volume of added acid required to reach the equivalence point
C. pH at 6.0 mL of added acid
D. pH at one-half of the equivalence point
E. pH at the equivalence point
F. pH after adding 6.0 mL of acid beyond the equivalence point
In: Chemistry