Essay on Chem: Chemical Compound and Hydrochloric Acid

Submitted By bballfoxy

Words: 507

Pages: 3

Open Document

| |During the Reaction |After the Reaction |
|Step 1 (mixture in 1 cup – |Band of mixture around 1 cm up from the bottom – |Smaller stones remain in the cup |
|stirring with magnet |darker material is lower and higher up the material |21.7 g |
|-Gray/brown mixture of grounded|is crystal-like | |
|stones (coarse sand) | | |
|23.04 g | | |
|Step 2 (add H2O to the |Immediate color change, some bubbles |Color changes to green/gray/blue, material mainly |
|remaining mixture) | |stays on the bottom (when stirred stays in clumps on |
| | |the bottom) |
| | |7 minutes later: top layer = liquid (blue/green |
| | |color), middle layer = small layer of clay, bottom |
| | |layer = sand (almost trapped under the clay) |
|Step 3 (pour mixture through |Water is coming out clear (slowly) |Water is clear (about 35mL in the beaker), mixture |
|filter) | |(clay and sand) remains in the filter |
|Step 4 (pour hydrochloric acid |Fizzing, bubbling, begins to turn brown |Brownish color, liquid on top, sand mixture below |
|into the mixture) | | |
|Step 5 (add hydrochloric acid |Fizzing, bubbling, smell of burning |Dried (cake-like) sand – lighter/more solid color |
|to the ‘pure’ sand/rock | |green, flakey rocks, on the bottom a hard, thin |
|mixture) | |crystal like crust remains |

What’s in the Cup?
Conclusions/Follow-up Questions:

List four different ways we attempted to separate the “stuff” in the cup and label each as a physical or chemical method.

a) Filter; physical method

b) Magnet; chemical method

c) Split amounts into beakers (2); physical method

d) Hydrochloric Acid added

Summary Of Lab: Synthesis Of Zinc Chloride

Second, we will measure the temperature of the water to determine the amount of heat absorbed or released during the course of this chemical reaction. Last, we will attempt to capture and identify the gas created as a product of this chemical reaction. Independent variable: Reacting the zinc and hydrochloric acid. Dependent variable: The result of the hydrochloric acid and zinc. Hypotheses: I hypothesize that the ratio of zinc(reactant)…

Words 1528 - Pages 7

School: Atom and Answer Booklet Essay

alpha particle (3) neutron (2) beta particle (4) electron 9 Which substance can be decomposed by a chemical change? (1) Co (3) Cr (2) CO (4) Cu 3 When the electrons of an excited atom return to a lower energy state, the energy emitted can result in the production of (1) alpha particles (3) protons (2) isotopes (4) spectra 10 The percent by mass of calcium in the compound calcium sulfate (CaSO4) is approximately (1) 15% (3) 34% (2) 29% (4) 47% 4 The atomic mass of an…

Words 3774 - Pages 16

Essay Morphine

prepared starting from commercially available arylarsonic acids, which can be subsequently assembled into dye compounds. This approach can be illustrated by a synthesis of arsonic acid carbocyanine dyes according to Scheme 1. In particular, arsanilic acid (A2) can be converted into corresponding diazonium salt (A3) by treatment with sodium nitrite in hydrochloric acid according to a known literature method [Bart Justus Liebigs Ann. Chem. 429, 100, 1922.] The diazonium salt can be reduced into corresponding…

Words 6273 - Pages 26

Titration Of Sodium Hydroxide Solution

Titration is a technique of slowly adding either an acid to a base or base to acid, until the equivalence point is reached. At the equivalence point, the number of moles of the titrant added corresponds to the number of moles of the substance being titrated. The titration technique is used to carry out a chemical reaction between two solutions by the controlled addition from a burette of one solution to the other, allowing measurements to be made throughout (Anne Marie, 2014). In order to observe…

Words 3879 - Pages 16

Semester 1 Study Guide Essay

HONORS CHEM S1 FINAL Thermochemistryhttp://www.youtube.com/watch?v=GqtUWyDR1fg&list=PL8dPuuaLjXtPHzzYuWy6fYEaX9mQQ8oGr and http://www.youtube.com/watch?v=SV7U4yAXL5I&list=PL8dPuuaLjXtPHzzYuWy6fYEaX9mQQ8oGr -read Ch. 10, just sections 10.3 and 10.5; pp. 317-318 # 24, 30, 32 DEFINITIONS energy: that which makes matter change -sound, fire, human movement, light, electricity -everything is either matter or energy system: reaction surroundings: everything outside of the reaction calorie:…

Words 1451 - Pages 6

Polymeric Molecules-Chains Of Chemical Subunits Linked End To End

CHAPTER 2 (39-50; 66-69; 78-79) Polymeric molecules- chains of chemical subunits linked end to end Properties enable cells & organism to grow and reproduce CHEMICAL BONDS Cells are made of atoms Elements – what matter is made of; hydrogen and carbon can’t be broken down by chemical means Atom – smallest particle of element; retains its properties At center is nucleus – positively charged; has the number of protons Surrounded by negatively charged electrons by electrostatic attraction Electrons…

Words 3072 - Pages 13

Chem lab Essay

of succinic acid was determined using a melting point apparatus. The melting point range was determined to be 185.4-189.2°C, giving an average melting point of 187.3°C with a correction factor of 0.70°C. See Figure 1. Thermometer Calibration Graph for a plot of the temperatures recorded vs. their correction factors. Discussion: Part A: Sodium benzoate is used to preserve certain foods against bacteria, yeasts and molds and is used to prolong their shelf life. This compound, when ingested…

Words 1152 - Pages 5

Essay about Lab Experiment 3 Families Of Elements

elements are arranged accordingly to increasing atomic number. Elements in the periodic table on the horizontal row are called periods and elements in vertical columns are called groups. The main objective of this experiment was to study the similar chemical properties of groups or elements in the periodic table by observing the reaction of barium, calcium, lithium, potassium, sodium, and strontium solutions. Also, observing the halide tests for bromide chloride and iodine solutions, then identifying…

Words 1482 - Pages 6

Essay about Collagen Content

Background In the period between 1920-1935 Nageotte (1927a, b, 1928, 1930, 1933), Nageotte & Guyon (1933), Leplat (1933), and Faure-Fremiet (1933) had studied and observed the partial dissolution of collagen in dilute solutions of weak acids such as formic and acetic acid. Renewed interest in this soluble protein was generated in the period between 1940-1955 with the works of Orekhovich and his colleagues in the U.S.S.R., who reported the extraction of a soluble collagenous-type protein from the skin…

Words 5693 - Pages 23

cobalt lab repoert Essay

known compound Q (Hexaaminecobalt(III) Chloride) and one unknown compound S. The purpose of this lab is to characterize the unknown compound and study the basic synthesize process of cobalt complexes. In order to identify the unknown compound, four characterization tests were performed using both compounds to determine the molar mass, non-ammonia ligands, the charge of the complex ion and the number of ammonia legends. As a result, the molar mass test related the absorbances of both compounds with…

Words 8001 - Pages 33