Until the 1850s virtually all dyes were obtained from natural sources, most commonly from
vegetables, such as plants, trees, and lichens, with a few from insects. Solid evidence that
dyeing methods are more than 4,000 years old has been prov
All problems are from:
General Chemistry, 5th
Ed. By Ebbing (1996)
CHOOSE YOUR OWN CHEMISTRY ADVENTURE
Why is stoichiometry helpful?
You are a student in SCH3U1 and your teacher has been
Determining the Chemical Formula for a Hydrate
Question: What is the chemical formula for the hydrate of copper (II) sulfate, CuSO4 H2O (s)?
Mass of empty beaker
Mass of beaker +
Water Density Lab
Purpose: this lab is aimed to calculate the density of water by measuring precisely the
volume and mass of water.
Quantitative Data Table:
cylinder(26.660 g 0.001 g)
In this experiment, baking soda and vinegar will be reacted to produce carbon
dioxide gas. This gas will be captured and measured, and its volume will be compared to
the theoretical values.
Baking soda or sodium bicarbon
In this experiment, one will determine the Ksp of Ca(OH)2 and its molar solubility in a
satuated Ca(OH)2 solution and in the presence of added Ca2+. A saturated Ca(OH)2
solution is decanted from solide Ca(OH)2; the OH- ion is titrated with a
Determine: density of water
Given: the mass of water: 5.862 g 0.002 g
The volume of water: 5.80 mL 0.10 mL
Equation: Density of water = mass of water volume of water
Substitution: Density of water = (5.862 g 0.002 g) (5.80 mL 0.10 mL)
= (5.862 g 0.034%) (
Only a few materials found in nature, iron, nickel, cobalt and gadolinium are
ferromagnetic, meaning they exhibit a strong response to a magnetic field by aligning with it.
All materials, however, experience some sort of reaction to magnetic fields, thoug
The rate of polymerization depends on the concentration of initiators, but more
importantly, the properties of the resulting gel also depend on the concentration of
initiators. Increasing the concentration of initiators (e.g., ammonium persulfate and
The economics of PAM use can encourage its use in many instances and discourage its
use in others. Polyacrylamide is very cost effective in furrow irrigation systems where it
can be applied at low rates through the irrigation water. In construct
Introduction: The solubility of a solute is the maximum quantity of solute that can
dissolve in a certain quantity of solvent or quantity of solution at a specified temperature.
Normally, organic products are not soluble in water because many of them
(b) Group 2 metal (+2) and Group 1? element (1), ionic, Cal-72;
(c) polyatomic anion (2) and +3 metal, ionic, A12(SO4)3;
(d) ammonium cation (+1) and Group 16 element (2), ionic, (NH4)23;
(e) not ionic, 802; and
(f) not ion