You have just added substance X to a glass of water. The pH of the water changed from 7 to 4. you conclude that substance X is a because it caused the amount of H+ ions in the water to for each...

Extracted text: You have just added substance X to a glass of water. The pH of the water changed from 7 to 4. you conclude that substance X is a because it caused the amount of H+ ions in the water to for each choice, the item in front of the semicolon (;) goes into the first space. the item behind the semicolon goes into the second space. for example if a choice says- "buffer; increase", buffer goes into 1st space and increase goes into 2nd space buffer; neither increase or decrease base; decrease base; increase acid; decrease O acid; increase