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