EXPERIMENTAL DESIGN DIAGRAM 1) Rend the following experimental scenario and fill out the Experimental Design Diagram Below for
the experiment described below.
METALS AND RUSTING TRON: In chemistry class, Allen determined the effectiveness of various
metals in releasing hydrogen gas from hydrochloric acid. Several weeks later, Allen read that a utilities
company was burying lead next to iron pipes to prevent rusting. Allen hypothesized that less rusting
would occur with the more active
metals. He placed the following into four separate beakers of water:
(A) I iron nail, (B) 1 iron nail wrapped with an aluminum strip. (C) I iron nail wrapped with a
magnesium strip.(D) iron nail wrapped with a lead strip.
He used the same amount of water, equal amounts (mass) of metals, and the same type of iron nails. At
the end of 5 days, he rated the amount of rusting as small
, moderate or large. He also recorded the color
of the water
EXPERIMENTAL DESIGN DIAGRAM
Title:
Problem Statement:
Hypothesis:
Manipulated (Independent)
Variable
Number of Tests
Responding (Dependent)
Variable
Control Test
Controlled Variables

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Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback

What is the independent variable in this investigation? mass volume sample number substance density

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat