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Ink type 2 – cobalt chloride solution or cocl2; Ink type 3 – phenolphthalein, Windex; Q-tips or paintbrush; What You Do: Choose a liquid like lemon juice to use as ink. Write a message on a piece of white paper using a paintbrush or q-tip, dipping in the ink frequently. Let the message dry. Turn on the toaster and carefully hold your paper ... If so, which reaction will take place? Solution Calculate the concentrations and substitute them into an expression and compute the "experimental concentration quotient" or "Q". If Q is equal to K eq (50 in this case) then the system is already at equilibrium and stable. If Q > K eq then the [product] is too high and must decrease. Therefore ... The Qubit dsDNA HS (High Sensitivity) Assay Kit is designed specifically for use with the Qubit Fluorometer. The assay is highly selective for double-stranded DNA (dsDNA) over RNA and is designed to be accurate for initial sample concentrations from 10 pg/L to 100 ng/L. Concentration cells are galvanic (or voltaic) cells made of two half-cells, each of which containing the same electrodes, but different concentrations. Concentration cells work to establish equilibrium by transferring electrons from the cell with the lower concentration to the cell with the higher concentration. The electrode potential difference between the two half-cells can be calculated ...