I need help Classifying these 4 TYPES of each reaction:?

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I need help Classifying these 4 TYPES of each reaction:?

1) Calcium reacts w/water to form calcium hydroxide & hydrogen gas
2) Tetraphosphorus deoxide reacts w/water to from phosphoric acid
3) Mercury & Oxygen are prepared by heating mercury (II) oxide
4) Aluminum hydroxide and hydrogen sulfide from when aluminum sulfide reacts w/ water.

2007-03-14 14:45:43 · 2 answers · asked by truckin_90 2 in Science & Mathematics ➔ Chemistry

2 answers

1. substitution or displacement reaction
2. Combination or synthesis
3. Decomposition or analysis
2. Double replacement or metathesis

2007-03-14 17:33:22 · answer #1 · answered by boobsy star 2 · 0⤊ 1⤋

1. Redox. Ca is oxidized and H+ is reduced.
2. Combination reaction
3. Redox. Hg is reduced and O is oxidized.
4. Metathesis: formation of a gas : H2S and a precipitate: Al(OH)3

2007-03-14 15:39:41 · answer #2 · answered by chemmie 4 · 0⤊ 0⤋