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Gold is resistant to most acids, though it does dissolve in aqua regia, a mixture of nitric acid and hydrochloric acid, which forms a soluble tetrachloroaurate anion. Gold is insoluble in nitric acid, which dissolves silver and base metals, a property that has long been used to refine gold and to confirm the presence of gold in metallic objects, giving rise to the term acid test. Gold also dissolves in alkaline solutions of cyanide, which are used in mining and electroplating. Gold dissolves in mercury, forming amalgam alloys, but this is not a chemical reaction.

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金は、王水、硝酸・塩酸可溶性塩化金の陰イオンを形作る混合物で溶解してそれがほとんどの酸に強いです。金、銀、非鉄金属、金を修正し、金属物の金の存在を確認するには長い間使用されてプロパティを溶解する硝酸に溶ける gi

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Gold dissolved in aqua regia, nitric acid and hydrochloric acid soluble chloride anions form compounds, it is resistant to most acids. Gi dissolves in nitric acid dissolve the property used to determine the presence of metallic gold, gold, silver and base metals, gold and fixed for a long time,

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金は王水、硝酸に溶解し、塩酸可溶性塩化物の陰イオン化合物を形成、ほとんどの酸に耐性があります。Gi 硝酸に溶解溶解金属の存在を確認するために使用するプロパティの金、金、銀、非鉄金属、金と長い時間固定

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The gold dissolved in aqua regia, nitric acid, forming compounds of hydrochloric acid soluble chloride anions are resistant to most acids. Property that is used to confirm the presence of melt melting metal GI nitric acid money, gold, silver and non-ferrous metals, gold and long time fixed

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金は、王水、硝酸、塩酸可溶性塩化物の陰イオンほとんど酸に耐性のある化合物を形成に溶解しました。存在を確認するために使用するプロパティを溶かす溶融金属 GI 硝酸お金、金、銀、鉄以外の金属、金と長い時間固定

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Money was dissolved to form compound almost in aqua regia, nitric acid, hydrochloric acid soluble chloride anions are resistant to acid. Metal melt property that is used to confirm the presence molten metal GI nitric acid money, gold, silver, iron, gold and long time fixed

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お金は王水、硝酸、塩酸可溶性塩化物の陰イオンの酸に耐性でほぼ複合フォームに分解しました。金属を溶かす存在溶融金属 GI 硝酸お金、金、銀、鉄、金と長い時間固定を確認するために使用するプロパティ

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Money acid anions in aqua regia, nitric acid, hydrochloric acid-soluble chloride in resistance nearly disassembled in composite form. Melt the metal being molten metal GI nitric acid money, gold, silver, iron, gold and property that is used to verify the time fixed for

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王水、硝酸、耐塩酸可溶性塩化金酸陰イオンは、複合形式でほぼ分解。溶融金属 GI 硝酸お金、金、銀、鉄、金およびプロパティの固定時間を確認するために使用されている金属を溶かす

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Aqua regia, nitric acid, hydrochloric acid corrosion resistance soluble chloride gold acid anion is almost broken down in composite form. Melt the metal are used to determine the fixed times of nitrate molten metal GI money, gold, silver, iron, gold and property

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王水、硝酸、塩酸腐食抵抗可溶性塩化金酸陰イオンはほとんど複合形状で分類され。溶融金属を固定する使用回数硝酸溶金属 GI お金、金、銀、鉄、金、財産

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Aqua regia, nitric acid, hydrochloric acid corrosion resistance soluble chloride gold acid anions are mostly categorized in a compound shape. Molten metal to use number of nitrate molten metal GI money, gold, silver, iron, gold and property

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王水、硝酸、塩酸腐食抵抗可溶性塩化金酸陰イオンは大抵複合シェイプに分類されます。溶融金属硝酸塩溶融金属 GI お金、金、銀、鉄、金、プロパティの番号を使用するには

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Aqua regia, nitric acid, hydrochloric acid corrosion resistance soluble chloride gold acid anions are usually classified into complex shapes. To use the number of the molten metal nitrate molten metal GI money, gold, silver, iron, gold and property

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王水、硝酸、塩酸腐食抵抗可溶性塩化金酸陰イオンは通常複雑な形状に分類されます。溶融金属硝酸塩溶融金属 GI お金、金、銀、鉄、金、プロパティの番号を使用するには

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Aqua regia, nitric acid, hydrochloric acid corrosion resistance soluble chloride gold acid anions are usually classified into complex shapes. To use the number of the molten metal nitrate molten metal GI money, gold, silver, iron, gold and property