Lab Worksheet Record your observations as clearly as possible. Note any changes in the solution colors. Observe the appearance of precipitates against a white background, noting the color and any other descriptive characteristics. Indicate the rate of evolution of gas bubbles (rapid or slow), and any detectable odor. In the absence of other signs of reaction, check for temperature changes. Solutions mixed Signs of Reaction a) 0.1M NaCl 0.1M KNO3 b) 0.1M NaCl 0.1M AgNO3 c) 1M Na2CO3 1M HCl d) 3M NaOH 3M HCl e) 0.1M CaCl2 0.1M H2SO4 f) 0.1M CuSO4 0.1M Zn(NO3)2

the dissolution of polymer can be thermodynamically described in 2 steps.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2