Question

in what ways are the reaction of hydrochloric acid with calcium oxid and calcium carbonate similar?

Answer 1

Explanation:

Ca­CO₃ is a wide­spread com­pound found in chalk, lime, mar­ble, and more. This sub­stance is a cru­cial pil­lar of hu­man life – it is used in con­struc­tion, to man­u­fac­ture pa­per and plas­tic, and in many oth­er spheres. It is also pop­u­lar in the food in­dus­try as a nat­u­ral white col­orant.

Cal­ci­um car­bon­ate is a sol­id white sub­stance that won’t dis­solve in it com­plete­ly: the wa­ter will turn a mud­dy col­or and a white pre­cip­i­tate will ap­pear. But if the re­ac­tion with wa­ter takes place in the pres­ence of car­bon diox­ide, it yields cal­ci­um hy­dro­gen car­bon­ate, a sol­u­ble acidic salt:

Ca­CO₃ + CO₂ + H₂O → Ca(HCO₃)₂

Let’s see how cal­ci­um car­bon­ate is ob­tained

Most cal­ci­um car­bon­ate is ob­tained from nat­u­ral sources. A pure source, com­mon­ly mar­ble, is usu­al­ly used to ob­tain the cal­ci­um car­bon­ate used in food col­or­ing.

Marble statue “David”, Michelangelo di Lodovico Buonarroti [Deposit Photos]

In the lab­o­ra­to­ry, pure cal­ci­um car­bon­ate can be ob­tained via cal­ci­um ox­ide slak­ing fol­lowed by car­bon diox­ide gas bub­bling. Wa­ter is mixed with cal­ci­um ox­ide to yield cal­ci­um hy­drox­ide. Car­bon diox­ide is then passed through the pre­vi­ous­ly-pre­pared so­lu­tion. Cal­ci­um car­bon­ate pre­cip­i­tates:

CaO + H₂O = Ca(OH)₂

Ca(OH)₂ + CO₂ = Ca­CO₃↓ + H₂O

Cal­ci­um ox­ide, also known as quick­lime or burnt lime, is com­mon­ly used in con­struc­tion. In in­dus­try, the cal­ci­um ox­ide need­ed for the above process is pro­duced via cal­ci­na­tion. Cal­ci­na­tion is the gen­er­al name for the chem­i­cal al­ter­ation of sub­stances via fir­ing or heat­ing to high tem­per­a­tures. If lime­stone or mar­ble is heat­ed to a tem­per­a­ture of 900-1000°C, the re­sult­ing chem­i­cal pro­cess­es yield car­bon diox­ide and the de­sired cal­ci­um ox­ide CaO:

СаСO₃ = СаО+СО₂↑

But if the tem­per­a­ture is even high­er (1500°C) and a car­bon source is present, the re­ac­tion will pro­duce cal­ci­um car­bide and car­bon monox­ide:

СаСO₃ + 4C = СаC₂ + 3СО↑