Câu 10: Khi nhúng quỳ tím vào các dung dịch sau, màu quỳ tím thay đổi như thế nào ? a) kali bromua, natri florua, kali iotua, natri clorua. b) natri hiđroxit, kali clorua, axit clohiđric, natri iotua. c) kali nitrat, axit clohiđric, natri bromua, axit iothiđric. d) axit bromhiđric, kali hiđroxit, natri iotua, kali bromua. Câu 11: Dung dịch đặc của chất nào sau đây bốc khói trong không khí ẩm? NaCl, NaOH, HCl, Ba(OH)2. Câu 12: Hoàn thành các phương sau (nếu có): Axit clohiđric với đồng(II) hiđroxit, bạc, đồng, thủy ngân, nhôm oxit, sắt(III) oxit, đồng(II) oxit, sắt, natri cacbonat, nhôm, canxi cacbonat, bari hiđroxit, natri sunfat, bạc nitrat.

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