Because they will react with each other "chalk up" the line. It'll look white.
I know cause I've done it :)
not sure
Calcium carbonate and sodium chloride are formed. CaCl2 + NaHCO3 = CaCO3 + 2 NaCl + H2) + CO2
Sodium bicarbonate, with four elements: sodium, hydrogen, carbon, and oxygen. Calcium chloride has only two elements and the others listed have three elements each.
Salt (sodium chloride) and limestone (calcium carbonate).
Na (sodium), K (potassium), Cl (chloride), Mg (magnesium), Ca (calcium).
sodium and potassium
When calcium chloride dissolves, it is rather exothermic (which makes it a good deicer for sidewalks). After mixing: the sodium and chloride ions will remain in solution and do nothing. The bicarbonate and calcium will react in a strange way. Ca2+ + 2 HCO3- → CaCO3 + H2CO3 As the calcium carbonate drops out of solution, the equilibrium of this reaction is further driven off to the right thus creating more carbonic acid. Carbonic acid easily decomposed to form water and carbon dioxide. H2CO3 → H20 + CO2 So, when you mix calcium carbonate and sodium bicarb, you get: Carbon dioxide gas, calcium carbonate solid, water and sodium and chloride ions.
Sodium, Na. Potassium, K. Calcium, Ca. Magnesium, Mg. Chlorine, Cl. Bicarbonate should be CO2. Phosphorus, P.
CaCl2 + 2NaHCO3 --> 2NaCl + CaCO3 +CO2 +H2O
Examples are: sodium chloride, potassium chloride, calcium chloride, ammonium chloride, ammonium phosphates, sodium carbonate, sodium sulfate, magnesium sulfate, cooper sulfate, magnesium chloride.
Depending on the concentration and the rules in each country.
sodium, potassium, chloride, calcium, magnesium, bicarbonate, phosphate, and sulfate