【Daily Question】March 18, 2016 – Participate to earn +2 wealth； +3 to 8 wealth for correct answers
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To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched to foster an active atmosphere for technical exchanges while offering rewards in the form of financial benefits to users. 【Daily Question】 (Single-choice question) To prepare a sulfuric acid solution of a certain concentration, it should be prepared using the （ ） method. A: Slowly pour concentrated sulfuric acid into water while stirring continuously.B: Slowly pour water into concentrated sulfuric acid while stirring continuously.
C: Calculate the correct amounts of water and concentrated sulfuric acid, then pour them together into a beaker and stir.
D: Any answer.
Standard answer: A. Reply with your answer in the comments; you will receive +2 points for participating. If you answer all questions correctly, you’ll get an additional +3 to +8 points. Those who provide thorough analyses and explanations for the questions (or include detailed calculation processes) will receive extra points as well. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions.
To prepare a sulfuric acid solution of a certain concentration, it should be prepared using the （ ） method. A: Slowly pour concentrated sulfuric acid into water while stirring continuously
A: Slowly pour concentrated sulfuric acid into water while stirring continuously； When concentrated sulfuric acid is added to water, heat is released; if mixing does not occur, the heat becomes concentrated and can cause boiling that may injure people ； Pouring water into concentrated sulfuric acid is even worse – it will immediately boil over
To prepare a sulfuric acid solution of a certain concentration, it should be prepared according to method ( A ). A Slowly pour concentrated sulfuric acid into water while stirring continuously. B Slowly pour water into concentrated sulfuric acid while stirring continuously. C Calculate the correct amounts of water and concentrated sulfuric acid, then pour them into a beaker and stir. D Prepare it arbitrarily
A: Slowly pour concentrated sulfuric acid into water while stirring continuously
A: Slowly pour concentrated sulfuric acid into water while stirring continuously
Choose A: Pour concentrated sulfuric acid into water! Reasons for the large density difference and heat of solution!