(A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. Lajos Winkler developed the Winkler Titration Method to determine the amount of DO in water. The endpoint in the Winkler Titration Method is determined by using starch as a visual indicator. 2. In the distillation process, the absence of a reaction when the distillate is mixed with the silver nitrate solution indicates that the distillate is impure water. In a simple distillation set-up, the cooling water exits at the bottom part of the condenser. 3. Water is composed of two atoms of both hydrogen and oxygen. In a water molecule, hydrogen has a partial negative charge. 4. The particles found at the bottom of a sedimentation tank/bottle are called sediments. The purified liquid collected in the distillation process is referred to as the distillate. 5. Sodium hydroxide and sodium chloride are both bases. H2SO4 and HCl are both acids.
(A) if both sentences are true,
(B) if both sentences are false,
(C) if the first sentence is true but the second is false, and
(D) if the first sentence is false but the second is true.
1. Lajos Winkler developed the Winkler Titration Method to determine the amount of DO in water. The endpoint in the Winkler Titration Method is determined by using starch as a visual indicator.
2. In the distillation process, the absence of a reaction when the distillate is mixed with the silver nitrate solution indicates that the distillate is impure water. In a simple distillation set-up, the cooling water exits at the bottom part of the condenser.
3. Water is composed of two atoms of both hydrogen and oxygen. In a water molecule, hydrogen has a partial negative charge.
4. The particles found at the bottom of a sedimentation tank/bottle are called sediments. The purified liquid collected in the distillation process is referred to as the distillate.
5. Sodium hydroxide and sodium chloride are both bases. H2SO4 and HCl are both acids.
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