________8：00 of August 8, 2008, Beijing will hold the 29th Olympic Games．

(   )8.We can buy the fresh fruits ________.
A. in Marsha s house                  B. in Wawa Village
C. in Country Life Market             D. in Next Wave Music Store
(   )9. Mr. Green is planning to have a half-year holiday in California, but he can’t leave his pet dog     alone, he should call ________for help.
A. 543-002       B. 544-996        C. 543-616        D. 544-471
(   )10. According to the four ads, which is true?
A. Wawa Village is open only at night.        
B. Marsha’s House does not offer food,
C. Country Life Market is newly opened.     
D. Next Wave Music Store sells presents.

(8分)（1）（4分）实验室在临时配制一些氯化铁溶液时，常将氯化铁固体先溶于较浓的盐酸中，然后再用蒸馏水稀释到所需的浓度，是为了                。氯化铁水溶液呈     性，原因是（用离子方程式表示）：                       。
（2）（2分）物质的量浓度均为0.1 mol/L的下列溶液pH 由大到小的顺序            
          （用序号表示）
①CH₃COOH  ②NH₄Cl       ③NaHCO₃    ④Ba(OH)₂      ⑤NaOH    ⑥N a₂CO₃
(3)（2分）物质的量浓度相同的下列溶液按c(CO₃^2－)由大到小的顺序是____________
①Na₂CO₃    ②NaHCO₃  ③H₂CO₃   ④ (NH₄)₂CO₃ ⑤NH₄HCO₃

(8分)计算：