Chem Lab 1 Statement Essay

Cydney Kessler Date of Test: 6/9/15

Survey Submitted: Summer 10, 2015

Title: Observations of Chemical substance and Physical Changes

Goal: the purpose of this lab test is that We are able to decipher the difference between a substance and physical change. I am about to notify whether a chemical substance change offers occurred throughout the experiment or perhaps if it was obviously a physical change and I can answer so why it is both. Procedure: Inside the lab try things out, I merged different types of chemical substances with different background to see if there was clearly a substance change, as well as to see which kind and so why that transform occurred. DAY TABLE you: Chemical Reactions

Well

Chemical #1

( some drops)

Chemical substance # 2

(4 Drops)

Observations

Chemical

Change

(Y/N)

A1

NaHCO3

SodiumBicarbonate

HCl

Hydrochloric Acid

Pockets

yes

A2

NaOCl

Sodium-Hypochlrite

Kl

Potassium Iodide

Declaration 1: None

Add 2 drops of solution

Observation two: Solution switched blue

Yes

A3

Kl

Potassium Iodide

Pb(NO3)2

Lead Nitrate

Turned Yellowish

Yes

A4

NaOH

Salt Hydroxide

C20H14O4

Phenolphthalein

Turned pinkish red (magenta)

Yes

A5

HCl

Sodium Hydroxide

C20 H14 O4

Phenolphthalein

Switched Cloudy

Certainly

A6

NaOH

Sodium Hydroxide

AhNO3

Silver precious metal Nitrate

Converted Brown

Yes

B1

AgNO3

Metallic Nitrate

NH4OH

Aqueous Ammonia

Observation one particular: Turned Gloomy

Absorb in paper bath towel & uncover to sun light

Observation a couple of: no response noted

certainly

B2

NH4OH

Aqueous Hydrogen

CuSO4

Copper mineral Sulfate

The response turned light blue

Yes

QUESTIONS

Presume a household item label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using your results from Data Stand 1 as being a guide, how would you evaluation this material Pertaining to the presence of salt bicarbonate? Put hydrochloric acidity and wait for a reaction. W.. Write the substance equation intended for the...



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