Write complete molecular equation for each observation and identify each reaction as redox or non-redox.C1:Observation: Zn reacts with HCl and produces a gas. Insertion of an ignited wooden splint results on an audible "pop" sound.Equation:Redox or Non-redoxC2a:Observation: A reddish color rust forms on the zinc strip.Equation:Redox or Non-RedoxC2b: Observation: No change in copper strip or solution color is observed.Equation:Redox or Non-Redox |ミ|ミ>>>>E|彡1彡|彡SOLUBILITY TABLECrOCH,COOBrCO3-OHNO,O-POSOAPWAWWAaNH,*WWWWWWWWW--BaWWWWWW.adCa2+WWCrWWWWd.--aCo+WWWAAWWAAWACuWWWAaWAWH*WWWWWWWFeWWWAWAFe+WWWAWAdAWd.MgAWWWWHg"AWAAWAaW.AWAIHg*WWWNiWWWWAWWWWWWWWKWWWAAga--Wa10WWWWd.WWNa*WWWWAWd.AAWASn2+DWWAAASn+WWWWWWAWAWAZnWWKey to abbreviations:w= only slightly soluble in water, but soluble in acidsW= soluble in waterA= insoluble in water, but soluble in acidsI= insoluble in both water and acidsd= decomposes in watera= insoluble in water, and only slightly soluble in acids In this type of metathetical reaction, heat is given off and a molecular species such as water is formed. If the solutions aredilute, the heat effect may not be noticeable and no visible change occurs. Thus, we use an indicator like phenolphthalein to indicatethat a reaction has occurred. Phenolphthalein is pink in basic solution and clear in acid solution. Strong acids and strong bases arecompletely ionized in solution.Carbonates are basic and theaddition of an acid will resultHNO, (aq) + KOH(aq) → KNO, (ag) + H:00)in the formation of bubbles of carbon dioxide gas:2HCI(aq) + CaCo, → CaCl:(aq) + H:0(0) + CO:(g)tPROCEDURES: Performeach of the following reactions. Write your observations in your notebook and write the equation for each reaction.1.Add a dropperful of 0.1 M NaOH and one drop of phenolphthalein to a test tube. Note the color. Add 0.1 M HCI drop by dropuntil the color changes. Feel the test tube. Can you detect the evolution of heat?Place a spatulaful of sodium carbonate in a test tube. Add a dropperful of 1M hydrochloric acid.2.PART II - REDOX REACTIONSRedox reactions are reactions in which elements are oxidized and reduced, i.e. some of the elements involved undergo a changein oxidation number. There are many types of redox reactions - combination reactions, decomposition reactions, replacement reactionsand combustion reactions. In this experiment, you will perform some combination, decomposition, and replacement reactions. Not allcombination and decomposition reactions are redox reactions.А.COMBINATION REACTIONSCombination reactions are those in which two or more substances combine to form a more complex substance. The generalformula for a combination reaction isA + B →CMany combination reactionsinvolve the reaction of twoelements to fom a compoundand these are all redox reactions.C + 0; → CO;Many elements react with oxygen to form oxides.4Na + 0, → 2 Na,0Some combination reactionsinvolve the reaction of twocompounds to form another compound. These are often not redox reactions. Metal oxides react with water to form metal hydroxides.The presence of the hydroxide ion is detected with phenolphthalein.Na,0 + H,0 → 2NAOHPROCEDURES: Performeach of the followingreactions. Write your observations in your notebook and write the equation for each reaction. Identify each reaction as redox or non-redox.Work under the hood! With a pair of tongs, hold a strip of magnesium in a bunsen burner flame. Do not look directly at theflame. Save the ash in a small beaker for the next procedure. If magnesium is substance "A" in the general equation, what is"B"?1.Add a dropperful of distilled water and a drop of phenolphthalein. The phenolphthalein is only an indicator for the presence ofhydroxide ion and does not enter into the equation.DECOMPOSITION REACTIONS2.В.A decomposition reaction is the reverse of a combination reaction. It involves the breakdown of a complex substance intosimpler substances. It is often necessary to heat the substance being decomposed. The general equation for a decomposition reaction isC - A + BMetal oxides decompose tothe metal and oxygen gas.This is a redox reaction.Metal hydroxides decomposeto the metal oxide and water.2Hg0 → 2Hg + O:This is not a redox reaction.PROCEDURES: Performeach of the followingreactions. Watch for evidenceMg(OH ), → Mgo + H;0of the decomposition products. Write your observations in your notebook and write the equation for each reaction. Identify eachreaction as redox or non-redox.1.Work under the hood! Weigh out exactly 0.1 g of ammonium dichromate and add to a test tube. Clamp and warm gently witha Bunsen burner. Two of the products of this reaction are chromium (III) oxide and nitrogen gas. Watch for evidence of thethird product.

Redox reaction: the reaction in which oxidation and reduction take place simultaneously.

Answered: Write complete molecular equation for…

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...