L2: MINERAL SALTS IN ORGANICS

L2: MINERAL SALTS IN ORGANICS

1. INTRODUCTION

Even though bones are very light, they also very strong. However, how strong they depends on how much of the mineral calcium carbonate they contain. Eggs and bones contain calcium carbonate, when calcium carbonate and acetic acid combine, a chemical reaction takes place and carbon dioxide is realised. This effect we observation becouse are some bubbles in solution, 

When bones are placed in the glass with acetic acid, the acid dissolve the calcium carbonate so that only collagen left. During foetal development, strong fibbers of collagen protein form a matrix for bones. The matrix solidifies by a process called calcification.. During this process, calcium phosphate or hydroxyapatite is deposited in the fibbers of collagen and gives the bones strenght and rigitidy.

2. OBJECTIVES

- Identify mineral salts in the organism

- Understand the funtion in organic biomolecules.

3. MATERIAL

- Some molluscs' shells (clams,mussels,etc.)

- Dried, cleaned chicken or lamb bones

- Water

- Acetic acid/ vinegrar

- Tong

- 2 * 600 mL Beaker

- Clock glass

- Destilled water

4.PROCEDURE

Chicken or lamb bones.

Carefully clean and cut ad much of the meat away from the chicken thin bones as possible. Examine the flexibility of the bone trying to bend it with your fingers. Take a beaker and make and acid acetic solution or add vinegrar. Take the chicken or lamb bones and drop them in acid acetic solution that you have made. Leave it 24-48 hours and see what happens to the bone. Remove the bones from the vinegrar with a tong and soak them with water. Annotacion: 

Lamb bone ribs; 18.2

Lamb bone 19

Mollusks shells.

Take another beaker and make the same acid acetic solution, Put inside some shells and make note of what is happening. 

5. RESULTS OR OBSERVATION

One week later we saw the bones are broken. And the mollusks shells disapear.