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		<h1>Đề thi HSG Môn Hóa Học CHỌN THI TỈNH QUỲNH LƯU</h1>
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			THI CHỌN ĐỘI TUYỂN HỌC SINH GIỎI LỚP 9
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<a href="http://bblink.com/qWxQOGn2"><span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><b><span lang="VI" style="font-size:22.0pt"><span style="line-height:107%">ĐỀ VÀ ĐÁP ÁN CHI TIẾT TẢI TẠI ĐÂY</span></span></b></span></span></span></a><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 1</span></b><span style="font-family:&#039;Times New Roman&#039;,serif"> (5,0 điểm)</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Mỗi trường hợp sau đây viết một phương trình hóa học minh họa:</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">1. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Kim loại tác dụng với dunh dịch muối chất tạo ra có một chất kết tủa,</span> <span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">một chất khí.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">2. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Kim loại tác dụng với dung dịch muối chất tạo ra có hai chất kết tủa, một chất khí.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">3. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Kim loại tác dụng với dung dịch muối chất tạo ra có hai muối không có sản phẩm nào khác.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">4. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Axit tác dụng với dung dịch muối chất tạo ra có kết tủa, có chất khí.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">5. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Axit tác dụng với muối không tạo kết tủa, không tạo khí.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">6. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Dung dịch bazơ tác dụng với dung dịch muối không tạo kết tủa.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">7. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Dung dịch muối tác dụng với oxit axit tạo ra bazơ.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">8. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Kim loại tác dụng với dung dịch muối tạo ra oxit bazơ. </span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">9. </span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Kim loại tác dụng với dung dịch muối tạo ra một muối không có sản phẩm nào khác.</span></span></span>
<ol start="10">
	<li style="text-align:justify"><span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Muối tác dụng với axit&nbsp; chất tạo ra có hai muối, một chất khí.</span></span></span></li>
</ol>

<div style="text-align:justify"><img alt="" height="310" src="https://khobaitap.com/uploads/news/2021_04/image_29.png" width="682" /><br  />
<span style="font-size:14pt"><span style="tab-stops:355.85pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><u><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 3</span></u></b><b> </b><span style="font-family:&#039;Times New Roman&#039;,serif">(4,0 điểm) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">1. Cho biết thành phần phần trăm</span> <span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">(theo khối lượng) của một loại quặng apatit như sau: %P = 18,45%</span><span style="font-family:&#039;Times New Roman&#039;,serif">;</span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif"> %O = 38,1%</span><span style="font-family:&#039;Times New Roman&#039;,serif">;</span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif"> %Ca = 39,68% và %F = 3,77%. Hãy biểu diễn công thức của quặng apatit dướ</span><span style="font-family:&#039;Times New Roman&#039;,serif">i</span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif"> dạng muối photphat và muối florua.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">2. Trộn số mol như nhau các muối NH<sub>4</sub>NO<sub>3</sub>, KNO<sub>3</sub> và Ca(H<sub>2</sub>PO<sub>4</sub>)<sub>2</sub> thu được một loại phân tổng hợp T. Tính %N, %K<sub>2</sub>O và %P<sub>2</sub>O<sub>5</sub> trong T.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">3. Trộn 0,2 lít dung dịch H<sub>2</sub>SO<sub>4</sub> xM với 0,3 lít dung dịch NaOH 1M thu được dung dịch A. Để phản ứng với dung dịch A cần tối đa 0,5 lít dung dịch Ba(HCO<sub>3</sub>)<sub>2</sub> 0,4M, sau phản ứng thu được m gam kết tủa. Tính giá trị của x và m</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><u><span lang="PT-BR" style="font-family:&#039;Times New Roman&#039;,serif">Câu 4</span></u></b><b> </b><span lang="PT-BR" style="font-family:&#039;Times New Roman&#039;,serif">(</span><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">3</span><span style="font-family:&#039;Times New Roman&#039;,serif">,0 </span><span lang="PT-BR" style="font-family:&#039;Times New Roman&#039;,serif">điểm)</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Hợp chất X được tạo bởi kim loại M có hóa trị không đổi và phi kim A có hóa trị II</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Lấy 13 gam hợp chất X chia 2 phần:</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Phần I: tác dụng với khí Oxi tạo ra khí Y.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Phần II: tác dụng với dung dịch HCl dư tạo ra khí Z.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">Trộn Y với Z thu được 7,68 gam kết tủa màu vàng và còn lại một chất khí mà khi cho gặp với nước Cl<sub>2</sub> tạo ra dung dịch T. Cho T tác dụng với dung dịch AgNO<sub>3</sub> được 22,96 gam kết tủa AgCl. Xác định công thức hợp chất X.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><u><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 5</span></u></b><b> </b><span style="font-family:&#039;Times New Roman&#039;,serif">(4,0 điểm)</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">Hỗn hợp X gồm 3 kim loại Al, Fe, Cu. Cho a gam hỗn hợp X vào dung dịch CuSO<sub>4</sub> dư, khuấy đều cho phản ứng xảy ra hoàn toàn, thì thu được 35,2 gam kim loại. Nếu hòa tan a gam hỗn hợp X trên vào 500 ml dung dịch HCl 2M đến khi phản ứng xảy ra hoàn toàn thu được 8,96 lít H<sub>2</sub> (đktc), dung dịch Y và b gam chất rắn.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">1. Viết các phương trình hóa học xảy ra và tính giá trị của b.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-family:&#039;Times New Roman&#039;,serif">2. Cho từ từ dung dịch NaOH 2M vào dung dịch Y và khuấy đều cho đến khi bắt đầu xuất hiện kết tủa thì dùng hết V1 ml dung dịch NaOH 2M, sau đó cho tiếp dung dịch NaOH vào đến khi lượng kết tủa không có sự thay đổi nữa thì lượng dung dịch NaOH 2M đã dùng hết 600 ml. Tính giá trị a và V1.</span></span></span></div>

<div style="text-align: center;"><span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-family:&#039;Times New Roman&#039;,serif">------ Hết -----</span></b><b><span lang="VI" style="font-family:&#039;Times New Roman&#039;,serif">-</span></b><b> </b></span></span></div>
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