Making ChalkBy: Alyssia Roche

What you need to know about making

chalkThe good news about

chalk: Excellent medium for adding soft

color, aging or shading to letters,

borders, backgrounds, and

embellishments

Versatile, inexpensive, and easy to

use Doesn't dry out and never needs

sharpening (unless in pencil form)

Takes up little space

Comes in dozens of colors

Forgiving (erasable) and flexible

Great investment

Long lasting

Chalk forms from the deep marine accumulation of the plates of organisms called coccolithophores. The plates are composed of the mineral calcite.

Why Do You think people put Chalk on the end of a Pool Stick?

The reason is friction. It may seem a bit unlikely that something so outwardly minor could actually supply a fundamental force of physics such as this, but the surface roughness made by applying the chalk affects the sliding friction and the "motion-resistance" between the pool cue and the contact area on the cue ball. Ultimately, it prevents the player from a miscue, typically a faulty contact where the tip slides off the ball without the proper spread for the stroke.

The reason why people eat chalk is because they have a disorder called Pica. is a medical disorder characterized by an appetite for substances largely non-nutritive (e.g. metal, clay, coal, sand, dirt, soil, feces, chalk, pens and pencils, paper, batteries, spoons, toothbrushes, soap, mucus, ash, gum, etc. or an abnormal appetite for food ingredients flour, raw potato, raw rice, starch, ice cubes, salt.

You are advised to undergo rectal examination to rule out fissure / piles (haemmeroids) 2. With regards to the black tarry stool you have to undergo endoscopy to rule out the cause for upper gi bleed,, once in a while bloody stools are caused in ulcerative colitis for that you need to undergo coronoscopy and barium enema,, in the mean time take medicine :liquid disogel 3 times a day 8 hourly , shun from drinking , tablet Sazo :salazopyrine can also give some relief. you can also contact me directly,, info in profile.

Why do people eat chalk?

Reason Why You would want to Make Chalk

Reasons for using chalk piece when Blood in stool ?

Na2CO3 +CaCl2 “Yields” CaCO3 + 2NaClSodium Carbonate (aq)

Calcium Chloride (aq)

Calcium Carbonate “Chalk” (S)

Sodium chloride (aq)

106 g/mol 111.1 g/mol 100.1 g/mol 58.5 g/mol

10.6g 11.11g Theoretical yield: 10g 11.7g

0.10 mol 0.10 mol 10g÷100.1 g/mol = 0.10mol

0.2mol

Conservation Of Matter

aq= aqueousS= solid

Reactants Products

Na 2Co 3

Sodium carbonate

also known as Na2CO3 is a sodium salt

of carbonic acid. It most commonly

occurs as a crystalline heptahydrate,

which readily effloresces to form a

white powder, the monohydrate.

Sodium carbonate is domestically well

known for its everyday use as a water

softener.

CaCl2

Calcium chloride

Making Chalk 1st experiment Na2Co3 + CaCl2 CaCo3

(Chalk) + NaCl

10.6g 11.11g 11.79g 5.79g

Beaker with out salt (148.86g)Beaker with salt(154.65g)

154.65g -148.86g

5.76gChalk with paper(14.16g) paper(2.37g)

14.16g - 2.37g

11.79g

Chalk % is 117.9% Hypothesis Was more salt in it.

After my 1st Experiment

ChalkChalk

Salt

Making Chalk 2ed experiment Na2Co3 + CaCl2 CaCo3

(Chalk) + NaCl

10.5 11.10 7.69g 10.01gBeaker with out salt (148.89g)Beaker with salt(15809g) 158.9g

- 148.89g10.01g

Chalk with paper (8.84g)Chalk with out paper (1.15g)

8.84 - 1.15

7.69g

Chalk % is 76.9%

Hypothesis = in my 2ed experim

ent

was that I s

hould wash th

e product

more and make sure that it

‘s mixed

more.

After my 2ed Experiment

ChalkSalt

Results for both experiments 1st time I did my experiment I had less salt left over , this can be a good thing it also can be a bad thing, the reason being is because I had way more chalk in my out come.

The 2ed time I did my experiment I had more salt and less chalk, I believe the reason why this happened is because the salt spilled out from it being on the burner for to long and it also being to get Hot and boiling over.

The End Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate or CaCO3. It forms under relatively deep marine conditions from the gradual accumulation of minute calcite plates (coccoliths) shed from micro-organisms called coccolithophores. It is common to find chert or flint nodules embedded in chalk. Chalk can also refer to other compounds including magnesium silicate and calcium sulfate.