116. Solving a chemistry problem

6. Give the calculation of the weighing interval of salt (M.m. potassium bromide 119.01) based on the sensitivity of the ion (M.m. bromide ion 79.91) to prove the authenticity of potassium bromide by bromide ion according to method B. Specify the weight for tests, the volume of water in which it will be dissolved. Give justification for the technique, give chemistry, indicate the external effect.
Carry out the calculation based on the sensitivity of the ion, according to the GF Xll section "General reactions to authenticity"