Chemical and Physical Properties Essay

Observe the solubility in hot water. c. Tear take out approximately 1/2-cm pieces of both red and meritless litmus paper. d. stand the solution to cool, and using the glass inhalation rod, transfer a neglect of the solution onto a piece of litmus paper. disposition the results. Clean the stirring rod. 5. Third test tube a. Add a few pipette drops of HCl (hydrochloric dosage) to the sample and stir. NOTE Use the test tube holderclamp as virtually responses are exothermic, i. e. the test tube may get very hot. place down any apparent reaction or solubility. Clean the stirring rod. 6. fourth part test tube Add a few pipet drops of NaOH ( atomic number 11 hydroxide) to the sample. Stir. Record any apparent reaction or solubility. Clean the stirring rod. 7. thoroughly clean and dry all 4 test tubes. Repeat stairs 2 though 6 with the next eye. Experimental Results marrow squash Zn Color Grey Odor none outcome of inflame decreases capacity curled in with lighter color Solub. Or chemic reaction w/ cutting H20 No reaction spy / not dis water-soluble Solub. Or reception w/ hot H20 Prolonged boiling from retained take fire/ non soluble litmus test None find stretch along HCI validating reaction resulting in the formation of gas, carbonation, and darkened lose weight NaOH creates foggy substance and blackens solid core group Cu Color Copper Odor None noted aftermath of foment Turned black Solub. Or Reaction w/ rimed H20 not soluble Solub. Or Reaction w/ hot H20 not soluble Litmus test None surveyd Dilute HCI tarnished not discover Dilute NaOH none observed content Mg Color Silver Odor None observed Effect of Heat increases in dullness Solub. Or Reaction w/ moth-eaten H20 no reaction observed/ non soluble Solub.Or Reaction w/ hot H20 increased heat / non soluble Litmus test no tack Dilute HCI rapid boiling and heat Dilute NaOH liquid state is cloudy Substance MgO Color White Odor None observed Effect of Heat none observed Solub. Or Reaction w/cold H20 fat-soluble Solub. Or Reaction w/ hot H20 Soluble Litmus test Red paper turned blue / blue no reaction Dilute HCI Carbonated Soluble Dilute NaOH enigmatical Soluble Substance CuC03 Color Green Odor pungent Effect of Heat turned black Solub. Or Reaction w/cold H20 somewhat murky, but does not appear solubleSolub. Or Reaction w/ hot H20 slightly murky, but none soluble Litmus test interpolates blue to red showing slight acidity Dilute HCI carbonation and soluble Dilute NaOH turns blue w/ slight soluble Substance Cu(NO3)2 Color Blue crystals Odor slight odor Effect of Heat melted and turned green Solub. Or Reaction w/cold H20 turned water blue and is soluble Solub. Or Reaction w/ hot H20 no transplant observed from the cool water and is soluble Litmus test blue litmus turned to red for acid Dilute HCI turned green Dilute NaOH soluble formed Substance NaClColor white crystals Odor none observed Effect of Heat none noted Solub. Or Reaction w/cold H20 becomes slightly solu ble Solub. Or Reaction w/ hot H20 fully soluble Litmus test red turns to blue indicating that its basic Dilute HCI none observed Dilute NaOH none observed QUESTIONS A Did you observe any chemical changes in this experiment? Chemical changes are observed during the experiment B What evidence did you use to decide that something was a chemical change? Indications of chemical changes were preceded by the burning, rusting, ermenting, and decomposing of the substances. As a result, a impertinent substance will have its own unique physical properties C Give at least two examples of chemical changes you observed. Adding colorless sodium hydroxide to blue copper(II) nitrate produces a light blue reduce Zinc diluted with Hydrogen Chloride is positive for a chemical reaction resulting in the formation of gas, carbonation, and darkened D Classify the by-line properties of sodium metal as physical or chemical Silver bimetal color physical Turns gray in air chemical Melts at 98oC phy sicalReacts explosively with chlorine chemical E Classify the following changes as physical or chemical Water freezes at OoC physcical change Baking soda when combined with vinegar produces bubbles- chemical change Mothballs stepwise disappear at room temperature physical change Ice cubes in a freezer get smaller with time physical change Baking soda loses mass as it is heated physical chemical Tarnishing of silver chemical change F How would you show that dissolving instrument panel salt is a physical change? A physical change will not change the composition of a substance.When adding water to a salt, the ions of table salt are hydrous with water molecules which reduced the starchy electrostatic forces of the ions. To return salt to the original state, simply remove the hydrated water molecules by boiling the table salt. Conclusions In a chemical change one or more overbold substances are formed. The new substance has its own unique identity which is disparate from th e original. It has properties that are different than those of the starting material in addition, the original materials is not able to be reproduced by physical means.