⑷ 0.0240 M H₂C₂O₄（oxalic acid）及 0.0360 M Na₂C₂O₄混合溶液

⑶礦泉水中含的 MgCO3濃度（ppm）。 （註：原子量 Mg = 24.3, Ca = 40.1, C = 12.00, O = 16.00）

⑴ 0.0400 M Na3PO4, Ka3(H3PO4) = 4.5 × 10-13

⑵ 0.0400 M Na2C2O4 Ka2(H2C2O4) = 5.42 × 10-5

⑶ 40.0 mL 的 0.1250 M NH3 與 20.0 mL 的 0.100 M HCl 混合溶液 Ka(NH4+) = 5.7 × 10-10

⑸ 0.0400 M C2H4(NH3+ Cl- )2 Ka1(NH3C2H4NH3+2) = 1.42 × 10-7

⑴計算氫氧化鋇莫爾濃度。

⑵如果重量與體積的標準偏差分別為±0.3mg 及±0.02 mL，計算莫爾濃度 的標準偏差並以有效數字表示氫氧化鋇莫爾濃度及標準偏差。

一、Translate the following English passage into Chinese.（25 分） British Prime Minister Theresa May is calling on her fractious Conservative Party to unite on a Brexit strategy and help her negotiate a separation agreement with the European Union. May told her party’s annual conference Wednesday in Birmingham they are entering the “toughest phase of the negotiations.” Britain will leave the 28-nation bloc on March 29 and talks to reach a divorce deal have stalled. An influential pro-Brexit faction within May’s party led by former foreign minister Boris Johnson is urging her to be firm and exit the European Union without a deal if necessary. The faction opposes May’s proposal for Britain to adhere to EU trade rules after it leaves, calling instead for a clean break. May did not rule out leaving without an agreement, but said doing so “would be a bad outcome for the U.K. and the EU.”

二、Translate the following Chinese passage into English.（25 分） 為了尋求更好的生活品質，越來越多的美國人搬到了較小的城市。美國 人口普查局的資料顯示，這些人正離開洛杉磯、芝加哥和紐約，搬到中 等規模的城市，例如鳳凰城、拉斯維加斯和達拉斯。對這些二線城市來 說，一個巨大的吸引力是住房成本在工資中占的比例小了很多。根據美 國人口普查局的統計，有超過一半的人因住房原因搬遷，他們要尋找一 個新的或更好的家，更便宜的住房，或買房而不是租房。在曼哈頓租一 個住處每月花費大約 4,100 美元。這幾乎是紐約市家庭年收入中位數 83,500 美元的三分之二。買房更是遙不可及，當地平均房價為 110 萬美 元。

三、Essay Writing（50 分） Speaking at a press conference, National Development Council (NDC) Minister Chen Mei-ling said that the idea of Taiwan as “a bilingual country” had been suggested to the government by several associations such as the European Chamber Of Commerce Taiwan and the Academia Sinica. The new bilingual plan’s main goal is to promote comprehensive English ability by Taiwanese nationals with advanced training for reading, speaking, listening, and writing skills. “In the era of the digital economy, an excellent language ability is necessary for the development of Taiwan,” Chen said. At present, the NDC is designing a comprehensive plan to put the bilingual-country policy into practice. Please recommend three concrete and feasible ways for our government to put the bilingual-country policy into practice and also explain why these ways are important. (You should write at least 250 words)