Here’s a video from one of my more recent field expeditions showing what geologists refer to as an “acid test.” In this test, you place a drop of diluted hydrochloric acid (HCl) on to the rock sample. A positive reaction for this test appears as a rapid fizzing or bubbling and indicates the presence of carbonate minerals. The bubbles observed in a positive acid test are actually carbon dioxide (CO2) gas being released. This CO2 gas is formed due to the instability and breakdown of carbonate minerals in the presence of HCl.
With that in mind, this video obviously demonstrates a positive result for our sample. This rock was taken (with proper permits) from the Spring Mountains, a mountain range located just outside Las Vegas, NV. The Spring Mountains are composed of carbonate rocks, primarily limestone and dolostone, which is why we see such a strong positive result.
can i ask how you memorize solubility rules? i learned it way back in 121, but didn't really use it for 122 and now that it's the end of the semester, everything's kind of hazy. we're at Ksp and quantitative analysis so it's becoming important again and i could use help refreshing myself!