Trouble, Haiyou, could you help answer the question about sodium chlorate next time? ? ? Thank you

Dude, there are a few mistakes; what’s found online isn’t necessarily accurate. 1. It is not a reversible reaction; reversible reactions are conditional. Neither the formation nor the decomposition of hyposodium can be reversible. 2. Neutral hyposodium will definitely decompose and escape; it cannot be neutral – it must be alkaline. 3. What you consider to be neutral is probably determined using a pH test strip or similar methods; in that case, you lose. Since hyposodium has strong oxidizing properties, it will oxidize the indicator, leading to inaccurate results; if it is necessary to determine the pH value, it can be calculated based on the amount of free base present. 4. It’s not the high pH value inside the tower; it’s the high alkalinity that persists. After the hyposodium was decomposed, the pH measurement method became effective; apparently, the pH increased. Thought question: After running for more time, the PH level dropped again. What’s going on?:)

You know such detailed things! Being taller makes people jealous; being significantly taller makes people envious. I’m truly grateful for your continuous help and guidance. I will have more questions if I get the chance. It’s an honor to meet you.

Hydrochloric acid is a very weak acid, even weaker than carbonic acid (which is carbon dioxide dissolved in water). Once the solution becomes neutral, carbon dioxide in the air reacts with sodium hypochlorite to produce sodium carbonate and hydrochloric acid. Hydrochloric acid is unstable and decomposes into hydrochloric acid and oxygen (which is also the source of its oxidizing properties). So, it’s okay not to run, as long as the environment is free of acidic substances – no nitrogen oxides, carbon dioxide, sulfides, or anything like that.

The original poster can take a look at the equilibrium diagram for chlorine, hypochlorous acid, and hypochlorite; the diagram below shows how this equilibrium changes as the pH value of the system varies.

The pH of our finished sodium hypochlorite product is around 12-13, with an effective chlorine content of about 13.5, and a free alkali level of around 0.5. We use waste sodium hypochlorite (in water) along with additional fresh sodium hypochlorite to achieve an effective chlorine concentration between 0.085 and 0.12. I’m not quite sure whether the effective chlorine referred to here refers to chlorine atoms or chloride ions; does a higher valence imply a stronger oxidizing power? Is that so?

May I ask, does \"effective chlorine\" refer to the chlorine atoms released from sodium hypochlorite or to chloride ions? Thank you very much

1. The concept of effective chlorine can be found online; it is explained in great detail, especially in the national standards. It can also be calculated using relevant formulas. Put simply: both elemental chlorine and chlorates possess oxidizing properties. Effective chlorine refers to the oxidizing capacity to convert all substances or salts with oxidizing properties into chlorine gas. What’s important is this ability to convert things into chlorine gas; in other words, effective chlorine denotes the oxidizing capacity, and once the effective chlorine level is known, the oxidizing capacity is also determined. 2. The free base amount is 0.3, and the pH value is 12; calculate it – it’s not possible to achieve a balanced mixture, right? ……If the pH is 12, the free base concentration is approximately 0.01 moles per liter. There are already problems with using traditional pH testing methods to measure strong oxidizers; to determine the pH value, it is necessary to calculate it based on the free alkali. You can search for the calculation method online.