Solder, being an alloy of lead and tin, has a lower melting point than the individual metals, making it ideal for welding electrical wires together. The low melting point of solder allows it to melt and flow easily, forming a strong bond between the wires without damaging them due to excessive heat.
Why is solder, an alloy of lead and tin, preferred for welding electrical wires together?
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Common indicators used to test for acids and bases include litmus paper, phenolphthalein, methyl orange, and universal indicator solution. Litmus paper turns red in acidic solutions and blue in basic solutions. Phenolphthalein transitions from colorless to pink in basic solutions. Methyl orange shifts from red in acidic solutions to yellow in basic solutions. Universal indicator solution provides a full range of colors to indicate the pH of a solution, from red (acidic) to purple (neutral) to blue (basic).