Determine the amount of phenol that is required to obtain sodium phenolate, weighing 100 grams.

Let’s implement the solution:
1. By the condition of the problem, we compose the equation
X g -? m = 100 g;
2C6H5OH + 2Na = 2C6H5ONa + H2 – substitutions, sodium phenolate and hydrogen were obtained;
2. Calculations:
M (C6H5OH) = 96 g / mol;
M (C6H5ONa) = 115.9 g / mol.
3. Let’s determine the quantity of the product, if its mass is known:
Y (C6H5ONa) = m / M = 100 / 115.9 = 0.86 mol;
Y (C6H5OH) = 0.86 mol since the amount of these substances according to the equation is 1 mol.
4. Find the mass of the original substance:
m (C6H5OH) = Y * M = 0.86 * 96 = 82.56 g.
Answer: to carry out the process, you need phenol weighing 82.56 g.