Balance Equation
__K + __F2 → __ KF
2,1,2
4 Na + O2 —> 2 Na2O What kind of reaction is it?
Combustion, single replacement, double replacement, synthesis, or decomposition
Synthesis (two or more substances combine into one)
Are lion fish venomous or poisonous?
venomous
Mixing bleach with ammonia is dangerous because it can form:
A. Carbon dioxide
B. Water vapor
C. Hydrogen gas
D. Chlorine/Chloramine gases
D. Chlorine/Chloramine gases
If the pH strip turns deep blue, the pH suggests the sample is:
A. Acidic
B. Neutral
C. Basic
C. Basic (High pH)
___ Al + ___ S8 —> ___ Al2S3
16,3,8
CH4+2O2→CO2+2H2O What kind of reaction is it?
Combustion, single replacement, double replacement, synthesis, or decomposition
Combustion (something reacts with oxygen, usually making CO₂ and H₂O)
Which plant’s sap can cause severe burns when exposed to sunlight?
A. Milkweed
B. Giant hogweed
C. Poison ivy
D. Oak tree sap
E. Rhubarb
B. Giant hogweed
Which of the following is a chemical change?
A. Toxins evaporating from a plant B. Toxins causing excessive blood coagulation C. A toxin dissolving into the blood stream D. Both A and C
B. Toxins causing excessive blood coagulation
Which observation best indicates the sample produced a gas? A. Does not ignite
B. Sharp odor similar to an indoor pool
C. Leaves residue
D. No visible color
E. Dulls a copper strip
B. Sharp odor similar to an indoor pool
__C2H2 + __O2 → __ H2O + __ CO2
2, 5, 2, 4
Zn+2HCl→ZnCl2+H2 What kind of reaction is it?
Combustion, single replacement, double replacement, synthesis, or decomposition
Single Replacement (one element replaces another in a compound)
Which of the following has venom with porins and catecholamines (bufotoxins) that can affect the heart and nervous system?
A. Cane toad
B. Poison dart frog
C. Portuguese man o’ war 14. Lionfish
D. Fat-tailed scorpion
A. Cane toad
Homogeneous mixture is best described as:
A. A mixture that is uniform throughout the liquid
B. A mixture with visibly separate parts
C. A compound
D. A pure element
E. A mixture that cannot be separated
A. A mixture that is uniform throughout the liquid
Which method can be used to separate iron from sand?
crystallization, magnetic separation, distillation, filtration, chromatography
magnetic separation
___ Al (OH)3 + ___ H2CO3 —> ___ Al2(CO3)3 + ___ H2O
2, 3, 1, 6
2H2O2→2H2O+O2 What kind of reaction is it?
Combustion, single replacement, double replacement, synthesis, or decomposition
Decomposition (one compound breaks into simpler substances)
Veratrum virides contain toxic _______ alkaloids that typically target the human’s nervous system and the cardiovascular system
steroidal
Lead exposure in children most commonly comes from:
A. New plastic toys and packaging
B. Fresh fruits and vegetables
C. Exhaust from motor vehicles
D. Contaminated rainwater
E. Old house paint and contaminated dust
E. Old house paint and contaminated dust
Which observation suggests dissolved solids?
A. White residue after evaporation
B. Blue pH strip
C. Chlorine odor
D. Copper dulling
A. White residue after evaporation
___ CH3CH2CH2CH3 + ___ O2 —> ___ CO2 + ___ H2O
2, 13, 8, 10
AgNO3+NaCl→AgCl+NaNO3 What kind of reaction is it?
Combustion, single replacement, double replacement, synthesis, or decomposition
Double Replacement (elements swap between two compounds)
This toxin triggers the Bezold-Jarisch reflex, which causes _____ (low blood pressure), _______(shortness of breath) _______ (slow heart rate).
bradycardia, hypopnea, hypotension
When a hazardous substance causes a chemical change to the human body, which of the following occurs?
A. Change of shape
B. Formation of a mixture
C. Formation of a new substance
D. Melting
E. Evaporation
C. Formation of a new substance
Which test eliminates rubbing alcohol as the sample? A. pH test
B. Residue test
C. Non-flammability
D. Chlorine odor
C. Non-flammability