How can pure dry crystals of calcium chloride be obtained from a solution of calcium chloride

A reaction mixture is at equilibrium. What happens when the amount of one of the reactants is lowered?

Calculate the pH of a solution with [H+] = 1.45 x 10-10 M.

The ammonia/ammonium buffer system is used to optimize polymerase chain reactions (PCR) used in DNA studies. The equilibrium for this buffer can be written as NH4 + (aq) ? H + (aq) + NH3 (aq) Calculate the pH of a buffer that contains 0.

Which statement is correct?1. Only nonpolar molecules have dispersion forces. 2. Only molecules that can hydrogen bond have dispersion forces. 3. Only polar molecules have dispersion forces. 4. Evaporation is an endothermic process. 5.

In this redox reaction, identify the element that was reduced. Fe2O3 + 3CO 2Fe + 3CO2 c co Fe Feo o

If a scientist creates a new rock-like substance in a laboratory, why wouldn't this type of material be classified as a true mineral?

Select the correct responses to the questions from the drop-down menus. Which wind blows cool air inland during the day? Which wind blows cool air toward the sea at night? Which winds blow steadily from specific directions and over long distances?

Consider the balanced equation for the following reaction: 3Ca (ClO3) 2 (aq) + 2Li3PO4 (aq) → Ca3 (PO4) 2 (s) + 6LiClO3 (aq) Determine the theoretical yield of LiClO3 (aq) in grams if the percent yield of LiClO3 (aq) is 81.0% and 9.

What is the total number of valence electrons in a sulfide ion in the ground state? (1) 8 (3) 16 (2) 2 (4) 18

Write the name and formula of the compound made of magnesium and fluorine