For a given solution, [ OH - ] pH , [ H 3 O + ] and whether the solution is acidic or basic has to be determined. Concept Introduction: pH: pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25 o C). It is the measurement of activity of free H + and OH - in solution. pH = − log [ H 3 O + ] pOH = − log [ OH − ] From ionization constant of water K w = [ H + ] [ OH - ] Ionization constant of water at 25 ο C K w = 1 × 10 − 14 . Less the pH , more is the acidity of the solution.
For a given solution, [ OH - ] pH , [ H 3 O + ] and whether the solution is acidic or basic has to be determined. Concept Introduction: pH: pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25 o C). It is the measurement of activity of free H + and OH - in solution. pH = − log [ H 3 O + ] pOH = − log [ OH − ] From ionization constant of water K w = [ H + ] [ OH - ] Ionization constant of water at 25 ο C K w = 1 × 10 − 14 . Less the pH , more is the acidity of the solution.
For a given solution, [OH-]pH, [H3O+] and whether the solution is acidic or basic has to be determined.
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
In this solution [OH-] is greater than [H3O+] and pH is more than 7.00. Hence this solution is a basic solution.
Hence this is a basic solution having pH=9.86 and [H3O+]=1.4×10-10M.
(b)
Interpretation Introduction
Interpretation:
For a given solution, [H3O+] the value of [OH-], pH and whether the solution is acid or basic that has to be determined.
Concept Introduction:
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
In this solution [H3O+] is greater than [OH-] and pH is less than 7.00 and hence the solution is acidic.
Hence this is an acidic solution having [OH-]=1.6×10-12M and pH=2.20.
(c)
Interpretation Introduction
Interpretation:
For a given pH, the value of the [H3O+] and [OH-] of the solution has to be calculated along with the prediction that whether the solution is acidic or basic.
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
As in this solution [H3O+] is greater than [OH-] and pH is less than 7.00 and hence the solution is acidic.
Hence this acidic solution have [OH-]=1.00×10-12M and [H3O+]=1.00×10−2M.
(d)
Interpretation Introduction
Interpretation:
For a given pH, the value of [OH-], [H3O+] and whether the solution is acid or basic that has to be determined.
Concept Introduction:
pH:
pH is a scale used to specify how acidic or basic a solution is. It ranges from 0-14. pH 7.0 is considered as neutral solution, pH more than 7.00 is taken as basic solution whereas pH less than 7.0 is considered as acidic solution (at 25oC). It is the measurement of activity of free H+ and OH- in solution.
In this activity you will research performance enhancers that affect the
endocrine system or nervous system. You will submit a 1 page paper on one
performance enhancer of your choice. Be sure to include:
the specific reason for use
the alleged results on improving performance
how it works
how it affect homeostasis and improves performance
any side-effects of this substance
Neurons and Reflexes
1. Describe the function of the:
a) dendrite
b) axon
c) cell body
d) myelin sheath
e) nodes of Ranvier
f) Schwann cells
g) motor neuron, interneuron and sensory neuron
2. List some simple reflexes. Explain why babies are born with
simple reflexes. What are they and why are they necessary.
3. Explain why you only feel pain after a few seconds when you
touch something very hot but you have already pulled your
hand away.
4. What part of the brain receives sensory information? What
part of the brain directs you to move your hand away?
5. In your own words describe how the axon fires.
Mutations
Here is your template DNA strand:
CTT TTA TAG TAG ATA CCA CAA AGG
1. Write out the complementary mRNA that matches the DNA
above.
2. Write the anticodons and the amino acid sequence.
3. Change the nucleotide in position #15 to C.
4. What type of mutation is this?
5. Repeat steps 1 & 2.
6. How has this change affected the amino acid sequence?
7. Now remove nucleotides 13 through 15.
8. Repeat steps 1 & 2.
9. What type of mutation is this?
0. Do all mutations result in a change in the amino acid
sequence?
1. Are all mutations considered bad?
2. The above sequence codes for a genetic disorder called
cystic fibrosis (CF).
3. When A is changed to G in position #15, the person does not
have CF. When T is changed to C in position #14, the
person has the disorder. How could this have originated?
Chapter 10 Solutions
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