Powders
What powder fizzes in hydrochloric acid, Iodine, and water?
Alka Seltzer
What is the chemical formula of aluminum
Which liquid has the lowest ph
Vinegar
Name 3 synthetic fibers
nylon, polyester, spandex, rayon
Name three types of fingerprint minutiae
answers may vary
What is the chemical formula for the powder that turns clear in Iodine
H2(C2H3O2)2
What metal is magnetic?
iron
Name all of the crime busters liquids and if they are an acid, base, or neutral
rubbing alc- neutral
hydrogen- neutral
vinegar- acid
lemon juice- acid
water- neutral
ammonia- base
what is the thickest layer of a hair?
cortex
What is the recycling code for PMMA?
7
Name the two most common uses for sodium acetate.
handwarmers, salt and vinegar chips
What 3 metals fizz in Hcl
zinc, magnesium, and aluminum
What is the difference between an acidic and basic liquid?
Acids add hydrogen ions while bases contribute hydroxide ions to a solution.
Name all the types of fibers and their distinctive burn test features.
plant- slow burn, smells like wood
animal- smells horrible, large ball of ash, curls away from flame, self extinguishing
synthetic- melts, curls away from flame, self extinguishing
What are the steps of PCR?
denaturation, annealing, elongation
Name 7 edible powders
Flour, baking soda, salt, cornstarch, yeast, gelatin, sugar, sodium acetate
Name a use of magnesium.
gunpowder, fireworks
which liquid, when mixed with bleach, produces vapor strong enough to kill you
ammonia
what protein is hair made up of?
keratin
What is the a difference between additional and condensational polymers?
Condensation reactions have byproducts and are generally more stable
A mixture contains irregular crystals, fizzes in HCl, turns black in iodine, is partly soluble and soupy in water, and is a uniform bright white color. There are also really small clumps that can easily be broken. Which mixture of 3 powders is it?
sugar, calcium carbonate, and cornstarch
What is the only crime busters metal that can not be found in our body naturally?
aluminum
What is the formula for the liquid with highest pH, and what is its conjugate acid?
NH3, NH3+ (ammonium)
Name the three main phases of hair growth.
anagen, catagen, telogen
How much of your total body weight is blood?
7-10%