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6th Grade - Unit 7
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If you mix 100 mL of strong acid with 100 mL of strong alkali, what is the final mixture - acid, alkali, or neutral?
neutral
If you mix 100 mL of strong acid with 50 mL of strong alkali, what is the final mixture - acid, alkali, or neutral?
acid
What can you mix with acids and alkalis to make them less dangerous?
water
If a substance turns litmus purple, what is it - acid, alkali, or neutral?
neutral
If a substance turns litmus red, what is it - acid, alkali, or neutral?
acid
Suggest the pH of lemon juice.
2-3
What is the pH of toothpaste - acid, alkali, or neutral?
alkali
What is used to neutralize acidic lakes and soil?
lime
What is the pH of this indigestion medicine - acid, alkali, or neutral?
alkali
What is the pH inside your stomach - acid, alkali, or neutral?
acid
When an acid reacts with an alkali, this is called a ___ reaction.
neutralization
What is the name of this equipment?
burette
If universal indicator is mixed with pure water, what color will you see?
green
In strong acids, universal indicator turns what color?
red
In alkalis, LITMUS turns what color?
blue
Acids are corrosive. What does corrosive mean?
it can dissolve skin & other substances
What is the name of a chemical that changes different colors in acid and alkalis?
indicators
If the pH is 13 - what type of substance is it? (strong acid, weak acid, neutral, weak alkali, strong alkali)
strong alkali
If the pH is 4 - what type of substance is it? (strong acid, weak acid, neutral, weak alkali, strong alkali)
weak acid
What has a sharp, sour, tangy taste - acid, neutral, or alkali?
acid
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