Fermentation Rate Proposition

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Science Fair Proposal By: Alvaro Lanzas, Victor Lara, Luis Rodriguez, and Andrea Bobadilla 1 Background Informa/on Fermentation is a change in which you convert grape sugar into ethyl alcohol. When you have the same amount of grape juice in different bottles, and add different amounts of sugar to each of them, the fermentation rate of juice will work slower. Fermentation in wine is the catalyst (“a substance that causes or accelerates a chemical reaction without itself being affected”(1)) function in which grape juice is turned into an alcoholic drink. The effect of high concentrations of sugar in grape juices or any solutions will affect the efficiency of fermentation. Apparently, the fermentation rate of juice seems to be less affected by high concentrations of sugar. Question How does the amount of sugar in grape juice affect it’s fermentation rate? Hypothesis When you have the same amount of grape juice in different bottles, and add different amounts of sugar to each of them, the fermentation rate of juice will work slower of those with greater amounts of sugar. Fermentation in wine is the catalyst (a substance that causes or accelerates a chemical reaction without itself being affected) function in which grape juice is turned into an alcoholic drink. The effect of high concentrations of sugar in grape juices or any solutions will affect the efficiency of fermentation. 2 Variables Independent: Amount of Sugar (g.) Dependent: Fermentation Rate (volume of gas produced) (mL.) Controlled: Same Juice (Grape) Same Amount of Juice (100 mL.) Same Amount of Yeast (2 g.) Same Sugar (El Cañal) Same Yeast (Saf-Instant Yeast) Materials · · · · · · · · · · · · 1 big funnel 12 small cups (plastic) weigh: (2.2 g.) A big empty container Graduated Cylinder 1 small funnel 1 small bag of Saf- Instant Yeast 6 empty “Barena” glass bottles 2
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