|
KHP mass measurements |
Titration of KHP with NaOH |
|||||
|
Initial (g) |
Final (g) |
Total (g) |
Initial NaOH vol. (mL) |
Final NaOH vol. (mL) |
Total NaOH sol’n (mL) |
NaOH molarity (molarity) |
|
73.9473 |
74.1675 |
0.2202 |
1.69 |
22.32 |
20.63 |
0.0523 |
|
97.6215 |
97.8296 |
0.2081 |
3.76 |
23.32 |
19.56 |
0.0521 |
|
95.8243 |
96.0261 |
0.2018 |
1.23 |
20.62 |
19.39 |
0.0510 |
From the sample volume and distances to the first and second equivalence points, calculate the molarities of hydrochloric and phosphoric acids in the sample. GIve uncertainties for the calculated molarities. How well do the replicated tritrations agree?
In: Chemistry
Which type of compound is an electrolyte if it is soluble in water?
a) an ionic compound soluble in water
b) a nonpolar molecular compund not soluble in water
c) a polar molecular covalent compound that is not a strong acid and does not ionize in water
2. When an electrolyte is dissolved in water, which of the following can carry the electric current in the aqueous solution?
a) water molecules b) cations c) anions d) both cations and anions
3. Which of the following are weak electrolytes?
a) molecular covalent compounds that are weak acids and ionize slightly in water
b) molecular covalent compounds that are weak bases and ionize slightly in water
c) both of these
In: Chemistry
Which type of compound is an electrolyte if it is soluble in water?
a) an ionic compound soluble in water
b) a nonpolar molecular compund not soluble in water
c) a polar molecular covalent compound that is not a strong acid and does not ionize in water
2. When an electrolyte is dissolved in water, which of the following can carry the electric current in the aqueous solution?
a) water molecules b) cations c) anions d) both cations and anions
3. Which of the following are weak electrolytes?
a) molecular covalent compounds that are weak acids and ionize slightly in water
b) molecular covalent compounds that are weak bases and ionize slightly in water
c) both of these
In: Chemistry
Ch 2-
ch 3
In: Biology
A View of Life and its Chemical Basis.
1. Explain the
basic characteristics that are common to all living things. 2.
Describe the levels of organization of life. 3. Distinguish among
the three domains of life and kingdoms. 4. Explain the process of
natural selection. 5. Identify the components of the scientific
method. 6. Contrast ionic and covalent bonds. 7. Explain how the
properties of water make life possible. 8. Recognize the importance
of functional groups in determining the chemical properties of an
organic molecule. 9. Summarize the categories of the main
macromolecules and provide examples of their diverse biological
functions: carbohydrates, lipids, proteins and nucleic
acids.
In: Biology
2. This extraction involves acid/base chemistry. Some amines (like carboxylic acids) are not very water soluble, but that property can change because of their basicity (or acidity). Which of the following could be added to an amine in order to make it more water soluble? (NOTE: look up relevant pKa and/or pKb values)
NaOEt
H2O
NaHSO4
H2
3. Benzoic acid is dissolved in a solution of sodium hydroxide. Half of the solution is added to a separatory funnel and combined with diethyl ether. The funnel is shaken vigorously. The ether now contains : a) sodium benzoate b) benzoic acid c) nothing d) sodium hydroxide
In: Chemistry
In: Physics
In: Biology
Acyl-CoA dehydrogenase deficiencies are diseases related to the impaired ability to oxidize fatty acids via beta oxidation. Symptoms of these acyl-CoA dehydrogenase deficiencies include hypoketosis [low blood levels of ketone bodies], hypoglycemia [low blood glucose], and hyperammonemia [increased blood levels of ammonia] during long periods of fasting.
a.) Please explain why patients with acyl-coA dehydrogenase deficiencies have bouts of hypogycemia [1- 2 sentences is sufficient].
b.) Please explain why patients with acyl-coA dehydrogenase deficiencies have bouts of hyperammonemia [1- 2 sentences is sufficient].
(BioChem) (Please type answer, thanks!)
In: Biology
Consider the following data on some weak acids and weak bases:
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|
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Use this data to rank the following solutions in order of increasing pH. In other words, select a '1'next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on.
Solution pH
0.1 M NaCl
0.1 M C6H5NH3Cl
0.1 M C5H5NHBr
0.1 M NaCN
In: Chemistry