Engine : Steam Plants - 635/811
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| A sample of boiler water can be chemically tested for alkalinity by initially adding a few drops of phenolphthalein and then slowly titrating the water sample until the __________. |
| A) sample color changes from pink to clear |
| B) water sample pH reaches 10.5 |
| C) entire concentration of chlorides have been neutralized |
| D) sample color changes from clear to pink |
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