Carbon dioxide dissolved in boiler water is...

Question 1 / 270705eccefa0bacbc34ba4d46fb8

Question 1 of 270705eccefa0bacbc34ba4d46fb8

Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.

Question 1 of 27070

Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.

🔍 Key Concepts

• boiler water chemistry and how dissolved gases affect metal surfaces • difference between corrosion (metal loss) and scaling (mineral deposits) • the specific reaction products when carbon dioxide (CO₂) dissolves in water

💭 Think About

• When CO₂ dissolves in water, what compound is formed and is it acidic or basic? How would that affect steel surfaces inside a boiler? • Which answer choices describe corrosion (eating away metal) versus scaling (building up deposits), and which one best matches what an acid would do? • Think about whether CO₂ by itself would create scale or pitting, or whether it mainly changes the pH of the boiler water.

✅ Before You Answer

• Identify which options refer to corrosion of metal surfaces rather than deposit formation. • Ask yourself: does CO₂ usually cause acid attack or scale deposits in boiler systems? • Eliminate any choices that require CO₂ to combine with other ions to form solids, since CO₂’s main effect is through changing water chemistry, not directly forming scale.

Question 1 of 27070

Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.

breaks the magnetic iron oxide film inside boiler tubes

forms carbonic acid which attacks the watersides

combines with oxygen to cause severe waterside scaling

combines with sulfates to cause severe waterside pitting

Question 1 / 270705eccefa0bacbc34ba4d46fb8

Question 1 of 270705eccefa0bacbc34ba4d46fb8

Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.

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Question 1 of 27070

Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.