Question

Содержание карбида кальция в образце технического карбида составляет 80%.рассчитайте,какую массу укусусной кислоты можно получить из 160г технического карбида

Answer 1

Решение:
CaC2+2H2O--->Ca(OH)2+C2H2
C2H2+H2O--->CH3CHO
CH3CHO--[O]-->CH3COOH
m(CaC2)=160*0.8=128г
M(CaC2)=64г/моль
n(CaC2)=m/M=128/64=2моль
По реакциям:
n(CH3COOH)=n(CaC2)=2моль
M(CH3COOH)=60г/моль
m(CH3COOH)=n*M=2*60=120г
Ответ:120г

Answer 2

Calculation of Acetic Acid from Calcium Carbide

To calculate the mass of acetic acid that can be obtained from 160g of technical-grade calcium carbide, we need to consider the reaction between calcium carbide (CaC2) and water (H2O). The reaction can be represented as follows:

CaC2 + 2H2O → C2H2 + Ca(OH)2

From the balanced equation, we can see that 1 mole of calcium carbide reacts with 2 moles of water to produce 1 mole of acetylene gas (C2H2) and 1 mole of calcium hydroxide (Ca(OH)2).

To determine the mass of acetic acid, we need to convert the mass of calcium carbide to moles and then use the mole ratio from the balanced equation to calculate the moles of acetic acid. Finally, we can convert the moles of acetic acid to grams.

Step 1: Convert the mass of calcium carbide to moles

The molar mass of calcium carbide (CaC2) is calculated as follows:

Ca: 40.08 g/mol C: 12.01 g/mol

Molar mass of CaC2 = (1 * 40.08) + (2 * 12.01) = 64.1 g/mol

To convert the mass of calcium carbide to moles, we use the following equation:

moles = mass / molar mass

moles of CaC2 = 160g / 64.1 g/mol = 2.498 moles (rounded to three decimal places)

Step 2: Calculate the moles of acetic acid

From the balanced equation, we know that 1 mole of calcium carbide produces 1 mole of acetic acid (C2H2). Therefore, the moles of acetic acid produced will be equal to the moles of calcium carbide.

moles of acetic acid = 2.498 moles

Step 3: Convert the moles of acetic acid to grams

The molar mass of acetic acid (C2H4O2) is calculated as follows:

C: 12.01 g/mol H: 1.01 g/mol O: 16.00 g/mol

Molar mass of C2H4O2 = (2 * 12.01) + (4 * 1.01) + (2 * 16.00) = 60.05 g/mol

To convert the moles of acetic acid to grams, we use the following equation:

mass = moles * molar mass

mass of acetic acid = 2.498 moles * 60.05 g/mol = 150.0 grams (rounded to one decimal place)

Therefore, from 160g of technical-grade calcium carbide, it is possible to obtain approximately 150.0 grams of acetic acid.