The solubility of ionic compounds in aqueous solutions is wide and varied. Some compounds are highly soluble (e.g. NaCl), some compounds are moderately soluble (e.g. SnI2) and some compounds are highly insoluble (e.g., AgCl). Determining which compounds are soluble and not soluble in a water medium is not a simple task.
For us in the Northern Hemisphere, the December solstice marks the longest night and shortest day of the year. Meanwhile, on the day of the December solstice, the Southern Hemisphere has its longest day and shortest night. This special day is coming up on Tuesday, December 22 at 4:48 UTC (December 21 at 10:48 p.m. CST). No matter where you live on Earthâs globe, a solstice is your signal to celebrate.
From the start to the end of the month, the length of the day decreases by 46 minutes, implying an average day-over-day decrease of 1.5 minutes. The shortest day of the month is November 30 with 9:56 hours of daylight; the longest day is November 1 with 10:41 hours of daylight.