Non-metals cannot conduct electricity or heat very well. As opposed to metals, non-metal elements are very brittle, and cannot be rolled into wires. The non-metals exist in two of the three states of matter at room temperature gases and solids. Alkali Metals are made up of six different elements and are found in group one on the periodic table. These metals have only one electron in their outer shell.
Also, the more stable the free radical that is left behind, the weaker its C-H bond strength will be. The difference between the bromine and chlorine product ratios can be partially explained by the Hammond postulate, which states that species with similar energy levels also have more similar structures and react more quickly and less selectively. In the experiment, five different hydrocarbons were tested to measure the rate of reaction with the addition of bromine. Two trials were done, one with the test tubes containing the hydrocarbons and added bromine sitting directly under a lamp, and another with the test tubes in a closed, dark space. Both trials contained a
EXPERIMENT 10: Solubility of Ionic Compounds Aim: How can we determine the solubility rules of ionic compounds? Materials: dropper bottles containing aqueous solutions of CaCl2, NaI , Na3PO4, AgNO3, CuSO4, NH4OH, , NaOH, and Na2CO3, plastic spot plates Introduction: A precipitation reaction occurs when two ionic compounds react in an aqueous solution to produce a precipitate, an insoluble (not soluble) substance which falls out of the solution. These reactions are a type of double-replacement, because the cations and anions of the reactants “change partners” in the products. For example: AgNO3 (aq) + NaOH (aq) ( AgOH (s) + NaNO3 (aq) According to Reference Table F, salts with hydroxide ions (OH-) are usually insoluble, and the silver ion (Ag+) is not an exception to this rule, so the AgOH that is formed will precipitate. However, in many instances, no precipitate forms because the recombination of ions yields only soluble compounds.
Although, Ionic bonding is when an atom gives away elections to another atom, which only happens in a metal and a nonmetal, and they have high melting points and are soluble. By investigating the unknown
When observing the solubility I asked Salowa to take a second glance at the iodine or zinc in the test tube, just incase I missed something. Likewise when Salowa was reading the graduated cylinder, I double-checked it to make sure we both agreed on the number. In a few cases we did not both agree on what the reading of the graduated cylinder was. In this case we called over a third person, Ardit, to read the graduated cylinder and see who he agreed with. This gave us accurate results by not having errors in our data.
CuSO4 4. What is the molar mass for anhydrous (without water) copper(II) sulfate? 159.62 g/mol Result: Observation: Some gray white substances precipitated from the water in the crucible. Data: * Mass of purified crucible and lid 30.59g * Mass of crucible and lid and hydrate 31.57g * Mass of hydrate alone 31.57g- 30.59g = .98g * Mass of crucible and lid and dehydrate 31.11g * Mass of dehydrate alone .52g This lab shows that hydrates are made up of crystal solids and water,
To be blacklisted means to be put on a list of people or products viewed with suspicion or disapproval (Free Dictionary), which means nobody would hire you for work. Blacklisting was kind of like what was going on in The Crucible because if you were accused of doing witchcraft, your reputation in the town of Salem was ruined. Arthur Miller’s development of fear in the Crucible is the same as the fear during the Red Scare. Abigail accused Tituba doing witchcraft and just because she was afraid of being hanged, she pled guilty. Being accused of being a witch in Salem, Massachusetts was alarming because even if one was innocent, they are still held guilty.
A) gas B) solid C) salts D) ice E) liquid 3. A small amount of salt dissolved in water is an example of a __________. A) compound B) solid C) heterogeneous mixture D) pure substance E) homogeneous mixture 4. Which of the following is an illustration of the law of constant composition? A) Water is 11% hydrogen and 89% oxygen by mass.
EXPERIMENT 11 Molar Mass of a Volatile Liquid DATA Run | UNKNOW | Mass of flask and foil(g) | 90.085g | Mass of flask and foil and condensed vapor (g) | 90.640g | Temperature of boiling water (˚C ) | 98˚C | Barometric pressure (torr) | 761mm Hg | Volume of flask (mL) | 140 mL | RESULTS Mass of unknown ( condensed vapor) | 0.555g | Volume of flask (vapor)(L) | 0.14 L | Temperature of vapor(k) | 371K | Molar mass of unknown (g/mole) | 118.380 g/mole | Advance Study Assignment 1) How would each of the following errors affect the outcome of this experiment? Would it make the molar mass high or low? Give your reasoning in three sentences or less in each case. a) The hole in the aluminum foil was quite large. if you were to have a larger hole in your aluminum cap, you would be losing vapor to the room.
Focus Questions: 1) What happens Qualitatively on both the Macroscopic and Atomic levels when zinc, Iodine and Acidified Water are mixed? Does a Reaction Occur? On the Macroscopic Levels, there is no reaction. However, when Zinc and Iodine and Water are mixed together a color is formed in the solution and a release of heat occurs, an exothermic reaction. The color starts out as a reddish brown color, and then, when swirled, becomes a gold yellowish color, and slowly becomes transparent clear at the end of the reaction.