题干

 (1)等质量的A、B两种物质分别与等质量的同浓度的稀盐酸充分反应,反应产生气体的质量与反应时间的关系如甲图所示.请回答下列问题:

①若A、B为Mg、Zn中的一种,则A是____,反应结束后只有一种金属剩余,则剩余金属为____

②若A、B为碳酸钠粉末和碳酸钙块状固体中的一种,反应结束后,则它们消耗的酸 ____ (填“A多”、“B多”或“相等”).B反应至a点时,所得溶液的溶质为 ____ (写化学式).

(2)如乙图所示,A、B、C、D、E分别是铁、硝酸铜溶液、二氧化碳、稀硫酸溶液、氢氧化钠溶液中的一种,A是硝酸铜溶液.(“﹣”相连两物质能发生反应)请回答:

①D的化学式为 ____ ,E物质的一种用途:____

②A与B反应的化学方程式 ____  ,基本反应类型是____


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\u9541,\u9541,B\u591a,CaCl2\u3001HCl,NaOH,\u706d\u706b,Fe+Cu\uff08NO3\uff092=Fe\uff08NO

同类题2

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    It is made from grapes grown without pesticides (杀虫剂) and chemicals, is kind to the environment and rarely causes hangovers (酒后头痛). Sales of organic wine are booming in the UK.

    According to the organic food and farming group Soil Association, sales of organic beers, wines and spirits rose by 14.3% last year to reach nearly £6 million, driven by the demand from consumers who are increasingly seeking “natural” food.

    “It seems that people are rediscovering their link with the environment through organic food. Organic wines also taste better, perhaps due to less use of man-made chemicals.” said Finn Cottle of Soil Association. As well as the benefits of producing grapes without using pesticides, organic wine also contains less sulphur dioxide (二氧化硫), which can contribute towards hangovers.

    Supermarkets are increasing supplies on their shelves to meet consumer demand, while the switch to online shopping has also helped, as people are more easily able to find what they are looking for. Vintage Roots is now one of the UK's biggest online shops of organic wine, while Ocado provides more than 100 different organic wines and Daylesford, best-known for its organic vegetable boxes, has branched out into organic wine and spirits.

    The discount supermarket Aldi is set to start its first collection of so-called “green” wines this week, offering eight wines with organic certificates. Aldi expects the wines to appeal to the young shoppers who are increasingly concerned about the environmental influence of the produce that they are buying and consuming.

    English organic wine producer Oxney Estate's Noir Rosé recently won the Waitrose prize for the most outstanding rosé wine at the competition. A spokeswoman for Waitrose said: “Organic wine is a growing trend globally and we have seen sales increase by 16% in the last year”.

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