at 25 degrees Celsius the following weak acid solution has a PH of 3.6 and a Ka of 1.9 x 10^-5. Which species has the highest concentration-A- or HA?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m