.C. is committed to supporting business and investing and has developed numerous valuable resources for business owners and investors at various stages in their endeavours. Learn about these resources and how you can make the most out of your opportunities. Business Management Thinking of starting a business but not sure where to stThe Ksp expression is A. Ksp = Sr2+ [ ]3 PO4 3− [ ]2 B. Ksp = 3Sr2+ [ ] 2PO4 3− [ ] C. Ksp = 3Sr2+ [ ]3 2PO4 3− [ ]2 D. Ksp = 3Sr2+ [ ]3 2PO4
Premium Sodium hydroxide Oxidizing agent Chemistry
Flame Tests The flame testing is a method used in chemistry to detect the presence of certain ions‚ primarily metal ions‚ based on each element’s characteristics emission spectrum. The colour of the flames normally depends on the temperature. Different types of Bunsen burner with flame types depend on the oxygen supply. The flame of rich fuel with no premixed oxygen produces a yellow diffusion flame. The flame of lean fully oxygen premixed flame produces no soot and the flame colour is produced
Premium
Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
Premium Water Ideal gas law Melting point
Unit 18 B Study Guide 1. Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A) 1.59e–2 B) 2.53e–2 C) 6.64e–17 D) 2.01e–3 E) 2.01e–2 2. The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A) Nothing. B) HY is stronger than HX. C) HX is stronger than HY. D) The acids have equal strengths. E)
Premium Solubility Concentration Sodium chloride
EXPERIMENT 5 Title: Conductivity of Strong Electrolytes Date: 16 August 2005 Objectives: ▪ To determine the relationship between the concentration and conductivity of various electrolytes ▪ To determine the conductivity at infinite dilution ▪ To determine the activity coefficients Theory: The resistance‚ R of a conductor with a similar cross section is proportional to the length (l) and inverse to the cross section area(A)‚ therefore; [pic]
Premium Electrochemistry Sodium chloride Physical chemistry
history and composition of fireworks should be known as well. Fireworks were invented somewhere between 600 and 900 A.D. and were used in a very different manner than today. During this time period‚ Chinese alchemists mixed together potassium nitrate (KNO3)‚ sulfur (S)‚ and charcoal to yield a form of gunpowder. This mixture was stuffed into bamboo shoots
Premium Light Fireworks Electromagnetic radiation
Pb(NO3)2 B2 yellow‚ not clear H. NaOH + phenolphthalein A3 purple‚ violet I. HCl + phenolphthalein A4 clear J. NaOH + AgNO3 D3 murkey‚ brown K. AgNO3 + NH3 A4 purple‚ then cloudy white/clear after exposure to bright light pink tint L. NH3 and CuSO4 A5 cloudy dark blue Part F: Testing of Various Foods with the NaOCl + KI solution Foods Presence or Absence of Starch potato yes lettuce turned somewhat dark green chip yes tortilla yes hot dog bun yes Part 2: Household Chemicals with
Premium Color Ammonia Green
dark blue then aqua blue. NaOCl and KI- Turned yellow. KI and Pb(NO3)2- Cloudy yellow. NaOH and phenolphthalein- Dark pink. HCl and phenolphthalein- Clear w/ No bubbles. NaOH and AgNO3 – Olive green. AgNO3 and NH3- Clear w/ Bubbles NH3 and CuSO4- Cloudy aqua blue. Questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? *I would test it with HCl to see if it begins
Free Acid Chemistry Bicarbonate
react with the iodide. The copper concentration of an unknown copper sample was determined using iodometric titration. The first part of the experiment involved the preparation of the working standard Cu(II) solution of specific concentration from CuSO4•5H2O. A standard sodium thiosulfate (Na2S2O3) solution was also prepared to serve as the titrant for the analysis. Proper handling should be administered for this solution since it decomposes into its component ions when it is exposed to acids‚ light
Premium Titration Sodium Iodine
moustaches‚ deep voice etc. ½ 5. Activity : Metal Q is added to salt solution of P. Q being more reactive ; displaces metal P from its salt solution. Chemical equation : Metal Q + Salt solution of P → Salt solution of Q + Metal P. Example : Zn Zinc + CuSO4 → ZnSO4 + Cu 1 Copper sulphate Zinc sulphate Copper 1 6. 1 volt is the potential difference between two points in a current carrying conductor when 1 joule of work is done to move a charge of 1 coulomb from one point to another. 1 Potential difference
Premium Magnetic field Chemical reaction Sodium chloride