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Blank filling. News reoprt 3 Rescue crews pulled a man to safety after a 1____ at a construction site in Brooklyn on Tuesday. The 2____ happened on the 400 block of Rutland Road just after 12:30 p.m. The Fire Department of New York says the 3____ 100-year-old building being pulled down partially collapsed. A man described as a “ non-worker civilian ” was 4____ to his waist in the basement. The man was 5_____ building materials when the first floor collapsed 6____ him. He was trapped under a beam about 10 feet below the 7____ for nearly an hour and a half. The man was then taken to hospital. Officials said he is in 8____ condition with non-life threatening injuries. The building was reportedly 9____ by a neighboring church in 2011. It was the site of a 2006 fire and 10____ vacant ever since.
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【单选题】已知100℃的温度下，水的离子积Kw＝1×10 -12 。本题涉及的溶液，其温度均为100℃。下列说法中正确的是 [ ]
A.
0.005 mol/L的H 2 SO 4 溶液，pH＝2
B.
0.001 mol/L的NaOH溶液，pH＝11
C.
0.005 mol/L的H 2 SO 4 溶液与0.01 mol/L的NaOH溶液等体积混合，混合溶液的pH为6，溶液显酸性
D.
完全中和pH＝3的H 2 SO 4 溶液50 mL，需要pH＝11的NaOH溶液50 mL
【单选题】已知在100 ℃的温度下，水的离子积K W =1×10 -12 。本题涉及的溶液，其温度均为100 ℃，下列说法中正确的是（ ）
A.
0.005 mol·L -1 的H 2 SO 4 溶液，pH=2
B.
0.001 mol·L -1 的NaOH溶液，pH=11
C.
0.005 mol·L -1 的H 2 SO 4 溶液与0.01 mol·L -1 的NaOH溶液等体积混合，混合溶液的pH为6，溶液显酸性
D.
完全中和pH=3的H 2 SO 4 溶液50 mL，需要pH=11的NaOH溶液50 mL
【简答题】什么是变压器的空载损耗和铁损耗?
【多选题】常温时，向pH =2的硫酸中加入等体积的下列溶液后，滴入甲基橙试液，出现红色，该溶液可能是 [ ]
A.
pH =12 的Ba(OH) 2
B.
pH =12的氨水
C.
0．005mol/L NaOH
D.
0．05mol/LBaCl 2
【简答题】欲配制一个总浓度c(Cu 2+ )=1.0mmol·L -1 ，游离[Cu 2+ ]=1.0×10 -16 mol·L -1 ，pH=7.20，缓冲容量不小于0.005mol·L -1 ·pH -1 的溶液100mL。问如何用0.010mol·L -1 EDTA[K s (CuY 2- )=2.5×10 15 ]，0.010mol·L -1 CuSO 4 ，0.100mol·L -1 NaH 2 ...
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