An evaporation–crystallization process of the type described in example 4.5-2 is used to obtain solid potassium sulfate from an aqueous solution of this salt. the fresh feed to the process contains 19.6 wt% k2so4. the wet filter cake consists of solid k2so4 crystals and a 40.0 wt% k2so4 solution, in a ratio 10 kg crystals/kg solution. the filtrate, also a 40.0% solution, is recycled to join the fresh feed. of the water fed to the evaporator, 45.0% is evaporated. the evaporator has a maximum capacity of 175 kg water evaporated/s.

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

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