When considering the reaction between pyrogallol and oxygen, what would you expect to observe when an anti-oxidant is present? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a The presence of anti-oxidant would make the mixture appear very, very dark. b The presence of anti-oxidant would make the mixture appear lighter in color. c The presence of anti-oxidant would make the mixture feel warmer. d The presence of anti-oxidant would make the mixture feel cooler. e The presence of anti-oxidant would lead to an explosion.

The stronger an acid, the Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b smaller its percent deprotonation. larger с more constant value for an acid at a given temperature

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The formation of magnesium bromide from Mg and Bry is represented in the particle diagram. Which of the following statements about the reaction is correct? Mg is oxidized because it loses two electrons as it forms Mg Mg is reduced because it gains two electrons as it forms Mg Bris oxidized because it goins an electron as it forms Br Bris reduced because it loses a proton as it forms Br

Enter a molecular equation for the reaction of dilute sulfuric acid with iron. (Assume that sulfuric acid acts as a diprotic acid and that an iron(II) compound is formed.) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.   Enter a molecular equation for the reaction of hydrobromic acid with magnesium. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.   Enter a molecular equation for the reaction of acetic acid, CH3COOHCH3COOH, with zinc. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

Study the reaction equation.   2??+?2→2???2Mg+O2→2MgO If magnesium (Mg) ions carry a 2+ charge, how are the electrons transferred in this reaction? a) Each O atom gives two electrons to an Mg atom. b) Each Mg atom gives one electron to an O atom. c) Each O atom gives one electron to an Mg atom. d) Each Mg atom gives two electrons to an O atom.

Consider the products of the following double replacement reactions and determine the correct chemical formula for the compound that will form a precipitate (a solid) in this reaction. If no precipitate is formed type the word NONE in all capital letters.   When typing chemical formulas do not use a space between the symbols for the element and or the parenthesis (when used). Do not format the subscripts. (i.e sodium phosphide enter Na3P). If no precipitate is formed type the word NONE in all capital letters.     a) Pb(NO3)2 + KI = ?    b) Al2(SO4)3 + NaOH = ?    c) HCl + KOH = ?  d) NaCl + AgNO3 = ?

OH Excess Oxidant

Part IV Cabbage Juice Indicator Chop cabbage into small pieces until you have about 2 cups of chopped cabbage. Boil for at least ten minutes to allow time for the color to leach out of the cabbage. Allow it to cool for 15 min • Filter out the plant material to obtain a red-purple-bluish colored liquid. 1. Add 1-2 drops of cabbage juice into a small bowl 2. Add 3-5 drops of vinegar into the bowl with the cabbage juice 3. Observe Is this a chemical change or physical change? Explain? Store the excess cabbage juice in your refrigerator, you will need them for future experiments.