Lab Report Chemical Change Essay Sample
The aims of this experiment are:
1. To detect some belongingss of chemical reactions
2. to tie in chemical belongingss with family merchandises
Background Information:
Chemical alterations are frequently accompanied by physical alterations. Three that you should non see in this lab are alterations in temperature. presence of a fire. and development of visible radiation. every bit when as fire beetle freshnesss. Three physical alterations that indicate a chemical alteration may hold occurred ( and that may be seen in this lab ) are:
1. Color alterations
2. Precipitate ( formation of a solid )
3. Formation of gas bubbles
Procedure:
No preliminary dilution of my trial chemicals were necessary as Lab Paq provided pre-diluted chemicals. Using the 96-well home base. 2 pipit beads of each chemical were added to the Wellss in the undermentioned combinations: a ) NaHCO3+HCl B ) HCl+Bromthymol bluish degree Celsius ) NH3+1 bead Bromthymol blue vitamin D ) HCl+blue dye vitamin E ) Blue dye+NaOCl followed by HCl degree Fahrenheit ) NaOCl+KI followed by assorted trial nutrients g ) KI+Pb ( NO3 ) 2 H ) NaOH+phenolphthalein I ) HCl + phenolphthalein J ) NaOH+AgNO3 K ) AgNO3+NH3 cubic decimeter ) NH3+CuSO4. Along the manner. observations were made refering to the reactions witnessed. This experiment concluded with proving family chemicals and proper disposal of lab chemicals.
Observations:
CHEMICALS Well # Reaction on white paper Chemical reaction on dark paper a. NaHCO3 + HCl A1 Bubbling Clear Liquid Bubbling Clear Liquid b. HCl + BTB B1 Golden Yellow Clear Liquid Amber Clear Liquid c. NH3 + BTB C1 Royal Blue Clear Liquid Dark Blue Opaque Liquid d. HCl + bluish dye D1 Emerald Green Clear Liquid Dark Green Opaque Liquid e. NaOCl + bluish dye E1 Bright blue that dissolved to yellow Same ; merely easier to see so to blanch yellow.
