Potions & Poisons B

[dvegadvol]

27. The electronegativity difference in diatomic elements is always equal to:

a. -2
b. -1
c. 0
d. +1
e. +2

28. Bonds between diatomic molecules are always;

a. Ionic
b. Covalent
c. Metallic
d. Polar covalent

29. T or F: An ionic bond is the complete transfer of outer valence electrons from one atom to another.

30. Match the toxin to the organism;

a. Cicutoxin 1. Quercus spp.
b. Amatoxins 2. Crotalus horridus
c. Three-finger toxin 3. Loxosceles reclusa
d. Tropane alkaloids 4. Lactrodectus mactans
e. Hydrolyzable gallotannins 5. Toxicodenron radicans
f. Canebrake venom 6. Daucus carota
g. Sphingomyelinase D 7. Galerina marginata
h. ⍺-latrotoxin 8. Micrurus fulvius
i. Urushiol 9. Hyoscyamus niger


31. Factors that effect the toxicity of a poison include all except:

a. Duration of exposure
b. Toxicity
c. Temperature
d. Dose
e. Route of exposure

32. A colloid has two phases:

a. stationary, mobile
b. dispersed, continuous
c. dissolution, sedimentation
d. dilution, disassociation

33. The toxicity of isopropanol is about _______________ ethanol.

a. 2.0 times less than
b. 1.2 times less than
c. about the same as
d. 1.2 time more than
e. 2.0 times more than

[UTF-8 U+6211 U+662F]

2. 125 g/0.95 = 131.6 g? It’s probably not this simple...

Nah, the correct answer would be (Click to Show Hidden Text)

3Si + 2N2 -> Si3N4
[math]\frac{125\textrm{ g Si3N4}}{0.95} \cdot \frac{1\textrm{ mol Si3N4}}{(28.1 \cdot 3+14.0 \cdot 4)\textrm{ g Si3N4}} \cdot \frac{3\textrm{ mol Si}}{1\textrm{ mol Si3N4}} \cdot \frac{\textrm{28.1 g Si}}{1\textrm{ mol Si}}[/math]
which turns out to be 78.8 grams of silicon.

[Crimesolver]

27. The electronegativity difference in diatomic elements is always equal to:

a. -2
b. -1
c. 0
d. +1
e. +2

28. Bonds between diatomic molecules are always;

a. Ionic
b. Covalent
c. Metallic
d. Polar covalent

29. T or F: An ionic bond is the complete transfer of outer valence electrons from one atom to another.

30. Match the toxin to the organism;

a. Cicutoxin 1. Quercus spp.
b. Amatoxins 2. Crotalus horridus
c. Three-finger toxin 3. Loxosceles reclusa
d. Tropane alkaloids 4. Lactrodectus mactans
e. Hydrolyzable gallotannins 5. Toxicodenron radicans
f. Canebrake venom 6. Daucus carota
g. Sphingomyelinase D 7. Galerina marginata
h. ⍺-latrotoxin 8. Micrurus fulvius
i. Urushiol 9. Hyoscyamus niger


31. Factors that effect the toxicity of a poison include all except:

a. Duration of exposure
b. Toxicity
c. Temperature
d. Dose
e. Route of exposure

32. A colloid has two phases:

a. stationary, mobile
b. dispersed, continuous
c. dissolution, sedimentation
d. dilution, disassociation

33. The toxicity of isopropanol is about _______________ ethanol.

a. 2.0 times less than
b. 1.2 times less than
c. about the same as
d. 1.2 time more than
e. 2.0 times more than

answer (Click to Show Hidden Text)

27. c
28. b
29. T
30. a-6
b-7
c-8
d-9
e-1
f-2
g-3
h-4
I-5
31.c
32.b
33. a(?)

[dvegadvol]

All good except 33. is 2.0 times more toxic.

Bravo!

[Crimesolver]

Thanks!

What is the difference between colloid and suspension?
Bronze is a combination of which metals?
T or F - copper is not used in cooking because of its inability to conduct heat evenly

[Deathstalker]

Thanks!

What is the difference between colloid and suspension?
Bronze is a combination of which metals?
T or F - copper is not used in cooking because of its inability to conduct heat evenly

1. A colloid is a heterogenous mixture that can pass through a filter, while a suspension cannot.
2. Bronze is a combination of Copper and Tin
3. F

[Crimesolver]

You forgot the third question
But for now

answers (Click to Show Hidden Text)

1. Colloids are actually a homogenous mixture that consists of particles that are permanently suspended, while suspensions are a heterogenous mixture that has particles that settles. Only the suspension can be separated through a filter. 
2. Yes

[Deathstalker]

You forgot the third question
But for now

answers (Click to Show Hidden Text)

1. Colloids are actually a homogenous mixture that consists of particles that are permanently suspended, while suspensions are a heterogenous mixture that has particles that settles. Only the suspension can be separated through a filter. 
2. Yes

I'm pretty sure Colloids are considered heterogeneous mixtures in most cases.

[dvegadvol]

A colloid is somewhere in between a truly homogeneous mixture and a heterogeneous mixture. At the microscopic level, a colloid is heterogenous. At the macroscopic level it is homogenous. Macroscopically, a colloid shows a single "phase": at this level, it will always have the same composition. But if you look at the microscopic level, you will find that there are at least two different regions, each with a different composition.

The individual particle in a colloid are small enough so that thermal movement (Brownian motion) prevents them from settling to the bottom of a container through gravity, although they can be separated by centrifugation (which is not possible for a true homogeneous mixture). On the other hand, colloids are usually not transparent, as they disperse light because the particles are as large or larger than the wavelength of visible light.