题干

已知硫酸铅难溶于水,也难溶于硝酸,却可溶于醋酸铵溶液中,形成无色的溶液,其化学方程式是:PbSO4+2NH4Ac=Pb(Ac)2+(NH42SO4

当Pb(Ac)2(醋酸铅)溶液中通入H2S时,有黑色沉淀PbS和弱电解质HAc生成.表示这个反应的有关离子方程式正确的是(   )

A:Pb(Ac)2+H2S=PbS↓+2H Ac

B:Pb2++H2S=PbS↓+2H+

C:Pb2++2Ac+H2S=PbS↓+2H Ac

D:Pb2++2Ac+2H++S2=PbS↓+2HAc

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答案(点此获取答案解析)

A

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                                                                                  Sea Life Melbourne Aquarium (水族馆)

   The all-new Sea Life Melbourne Aquarium, situated in the heart of Melbourne’s CBD, is one of Victoria’s leading visitor attractions and an unforgettable outing for the whole family. Having 12 amazing zones of discovery, Sea Life Melbourne Aquarium is the very place that you cannot miss when you visit the city.

* Opening Times

     Sea Life Melbourne Aquarium is open from 9:30 am until 6:00 pm every day of the year, including public holidays. Last admission is at 5:00 pm, one hour before closing.

* Location ( 位置)

     Sea Life Melbourne Aquarium is located on the corner of Flinders Street and King Street, Melbourne. It is siyuated on the Yarra River, opposite Crown Entertainment Complex.

* Getting to Sea Life Melbourne Aquarium

     Train

     The Sea Life Melbourne Aquarium train stop is located on the free City Circle Tram route (公交线路) and also routes 70 and 75. City Circle trams run every 10 minutes in both directions.

     Shuttle Bus

     The Sea Life Melbourne Aquarium is a free bus service, stopping at key tourist attractions in and around the City. Running daily, every 15 minutes from 10:00 am to 4:00 pm.

      Car Parking

      While there is no public car parking at Sea Life Melbourne Aquarium, there are several public car parking lots available only a short walk away.

* Wheelchair Access

      Sea Life Melbourne Aquarium provides people in wheelchairs with full access to all 12 zones. Each floor also has wheelchair accessible toilets.

* Terms

      Tickets will be emailed to you immediately after purchase or you can download and print your ticket once payment has been accepted. Please print out all tickets purchased and present at the front entrance of Sea Life Melbourne Aquarium. No ticket, no entry!