 # What is the chemical equation between carbon dioxide and limestone

## What is the chemical equation between carbon dioxide and limestone

CO2 + H2O + CaCO3 = Ca (HCO3) 2 balanced
The answer is hard, if correct,

### What is the chemical equation for the reaction between carbon dioxide and limestone

CaCO3+H2O+CO2=Ca(HCO3)2

### Chemical equation for carbon dioxide production from dilute sulfuric acid and limestone There is also a chemical equation for preparing carbon dioxide from sodium carbonate and dilute hydrochloric acid Urgent! Urgent! Is sodium carbonate Na2CO3? What about calcium carbonate powder and dilute sulfuric acid?

Typical double decomposition reaction:
Sodium carbonate and dilute hydrochloric acid:
Na2CO3+2HCl=2NaCl+H2O+CO2↑
Calcium carbonate powder and dilute sulfuric acid:
CaCO3+2HCl=CaCl2+H2O+CO2↑

### When 100g of table salt solution with solute mass of 10%, the mass fraction of solute increases by 20%, and the volatile water needs to be evaporated How many grams of water does it take to evaporate 100g of table salt solution with 10% solute mass and 20% solute mass fraction? Or how many grams of salt do you need? What is the mass fraction of sodium hydroxide solution when 160g of 20% sodium hydroxide solution and 240g of 40% sodium hydroxide solution are mixed?

1. Add 12.5g NaCl or 50g.100g evaporated water. The mass fraction of solute is 10%. The mass fraction of solute is 100 * 10% = 10g (1) set the mass of NaCl as X. (10 + x) / (100 + x) = 20% x = 12.5g (2) set the mass of evaporated water as x.10 / (100-x) = 20% x = 50g. 2. The mass fraction of solute after mixing = 160 * 20% + 240 * 40% = 1

### At 20 ℃, 100g of table salt solution with solute mass fraction of 5% is treated as follows, and the solution with solute mass fraction increasing each time is completely dissolved 1) After 10 g of water is evaporated, the mass fraction of solute is? 2) After adding 10gnacl, the mass fraction of solute is?

1、100g*5%/(100g-10g)=5.56%
2、(100g*5%+10g)/(100g+10g)=13.6%

### At 20 ℃, 100g of table salt solution with solute mass fraction of 5% is treated as follows, and the solution with solute mass fraction increasing each time is completely dissolved After adding 10gnacl and 10g water, the mass fraction of solute is Add 100g of table salt with solute mass fraction of 15% to dissolve the solute mass fraction

In 100g5% sodium chloride solution, the solute containing sodium chloride is: 100gx5% = 5g; Water content 100g -- 5g = 95g; After adding 10g NaCl, the solute mass is 5g + 10g = 15g; The solution mass is the total mass of the original sodium chloride solution and 10g NaCl and 10g water added, i.e. 100g + 10g + 10g = 120g; Therefore, the mass fraction of solute is: 15g / 120g = 12.5%;
Mass of solute in 100g 15% NaCl solution: 100x15% = 15g; After the two solutions are mixed, the total mass of solute in the solution is 5g + 15g = 20g; The total mass of the solution is 100g + 100g = 200g; Therefore, the mass fraction of solute after mixing is 20g / 200g = 10%