Please answer letters A to C. Thank u! AIn the Chemical Changes experiment (E3) on copper, which of the steps can be omitted if our goal is only to obtain drycopper(II) oxide solid?O a. Decanting and adding sulfuric acid to dissolve black precipitateO b. Filtering and heating until dry and fully blackO c. Boiling of previous solution until blackO d. Addition of NaOH to Cu(NO3)2 solutionThe concentration of the sodium hydroxide titrant is determined with the use of KHP as primary standardbecause KHP is:O a. readily abscrbs atmospheric moisture.O b. comes in a highly concentrated form.Ос.is a low molecular weight substance.O d. is non-hygroscopic.Which of the following statements is true?The equivalence point is the condition where the moles of analyte is equal to the moles of titrantO b. The equivalence point is represented by the formation faint pink colorThe end point is always equal to the equivalence pointO d. None of the above

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In the Chemical Changes experiment (E3) on copper, which of the steps can be omitted if our goal is only to obtain dry copper(II) oxide solid? O a. Decantíng and adding sulfuric acid to dissolve black precipitate O b. Filtering and heating until dry and fully black O c. Boiling of previous solution until black O d. Addition of NaCH to Cu(NO3)2 solution