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I am preparing for my Chemistry exam next week. I came across this question and I am unsure of the answer. Any insight would be greatly appreciated.I'm not sure what approach to take in order to answer the question.

In an experiment, $$5$$ $$\text{cm}^3$$$$\pu{5 cm^3}$$ of $$1$$ $$\text{mol/dm}^3$$$$\pu{1 mol/dm^3}$$ sodium hydroxide are gradually added to $$10$$ $$\text{cm}^3$$$$\pu{10 cm^3}$$ of $$1$$ $$\text{mol/dm}^3$$$$\pu{1 mol/dm^3}$$ hydrochloric acid containing methyl orange. What changes changes occur in the mixture?

• A) The concentration of H+ ions increase (decreases)
• B) The methyl orange changes colour
• C) More water molecules are formed (water is formed, but use of the word 'more'??)
• D) A precipitate is formed (no ppt formed, NaCl is soluble)
1. The concentration of $$\ce{H+}$$ ions increase (decreases)
2. The methyl orange changes colour
3. More water molecules are formed (water is formed, but use of the word 'more'??)
4. A precipitate is formed (no ppt formed, $$\ce{NaCl}$$ is soluble)

I thought the answer would be B(2). However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the $$1:1$$1:1 mole ratio, the HCl$$\ce{HCl}$$ would be in excess, so would it still change colour?

I am preparing for my Chemistry exam next week. I came across this question and I am unsure of the answer. Any insight would be greatly appreciated.I'm not sure what approach to take in order to answer the question.

In an experiment, $$5$$ $$\text{cm}^3$$ of $$1$$ $$\text{mol/dm}^3$$ sodium hydroxide are gradually added to $$10$$ $$\text{cm}^3$$ of $$1$$ $$\text{mol/dm}^3$$ hydrochloric acid containing methyl orange. What changes occur in the mixture?

• A) The concentration of H+ ions increase (decreases)
• B) The methyl orange changes colour
• C) More water molecules are formed (water is formed, but use of the word 'more'??)
• D) A precipitate is formed (no ppt formed, NaCl is soluble)

I thought the answer would be B. However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the $$1:1$$ mole ratio, the HCl would be in excess, so would it still change colour?

In an experiment, $$\pu{5 cm^3}$$ of $$\pu{1 mol/dm^3}$$ sodium hydroxide are gradually added to $$\pu{10 cm^3}$$ of $$\pu{1 mol/dm^3}$$ hydrochloric acid containing methyl orange. What changes occur in the mixture?

1. The concentration of $$\ce{H+}$$ ions increase (decreases)
2. The methyl orange changes colour
3. More water molecules are formed (water is formed, but use of the word 'more'??)
4. A precipitate is formed (no ppt formed, $$\ce{NaCl}$$ is soluble)

I thought the answer would be (2). However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the 1:1 mole ratio, the $$\ce{HCl}$$ would be in excess, so would it still change colour?

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I am preparing for my Chemistry exam next week. I came across this question and I am unsure of the answer. Any insight would be greatly appreciated.I'm not sure what approach to take in order to answer the question.

In an experiment, 5 cm3 of 1.0 mol/dm3 sodium hydroxide are gradually added to 10 cm3 of 1.0 mol/dm3 hydrochloric acid containing methyl orange. What changes occur in the mixture?

• A)The concentration of H+ ions increase [x- decrease]
• B) The methyl orange changes colour
• C) More water molecules are formed- [x water is formed (but use of the word 'more'??)]
• D) A precipitate is formed [x- no ppt formed, NaCl is soluble]

In an experiment, $$5$$ $$\text{cm}^3$$ of $$1$$ $$\text{mol/dm}^3$$ sodium hydroxide are gradually added to $$10$$ $$\text{cm}^3$$ of $$1$$ $$\text{mol/dm}^3$$ hydrochloric acid containing methyl orange. What changes occur in the mixture?

• A) The concentration of H+ ions increase (decreases)
• B) The methyl orange changes colour
• C) More water molecules are formed (water is formed, but use of the word 'more'??)
• D) A precipitate is formed (no ppt formed, NaCl is soluble)

I thought the answer would be B. However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the 1:1$$1:1$$ mole ratio, the HCl would be in excess, so would it still change colour?

I am preparing for my Chemistry exam next week. I came across this question and I am unsure of the answer. Any insight would be greatly appreciated.I'm not sure what approach to take in order to answer the question.

In an experiment, 5 cm3 of 1.0 mol/dm3 sodium hydroxide are gradually added to 10 cm3 of 1.0 mol/dm3 hydrochloric acid containing methyl orange. What changes occur in the mixture?

• A)The concentration of H+ ions increase [x- decrease]
• B) The methyl orange changes colour
• C) More water molecules are formed- [x water is formed (but use of the word 'more'??)]
• D) A precipitate is formed [x- no ppt formed, NaCl is soluble]

I thought the answer would be B. However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the 1:1 mole ratio, the HCl would be in excess, so would it still change colour?

I am preparing for my Chemistry exam next week. I came across this question and I am unsure of the answer. Any insight would be greatly appreciated.I'm not sure what approach to take in order to answer the question.

In an experiment, $$5$$ $$\text{cm}^3$$ of $$1$$ $$\text{mol/dm}^3$$ sodium hydroxide are gradually added to $$10$$ $$\text{cm}^3$$ of $$1$$ $$\text{mol/dm}^3$$ hydrochloric acid containing methyl orange. What changes occur in the mixture?

• A) The concentration of H+ ions increase (decreases)
• B) The methyl orange changes colour
• C) More water molecules are formed (water is formed, but use of the word 'more'??)
• D) A precipitate is formed (no ppt formed, NaCl is soluble)

I thought the answer would be B. However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the $$1:1$$ mole ratio, the HCl would be in excess, so would it still change colour?

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# What changes occur when adding differing amounts of acids & bases?

I am preparing for my Chemistry exam next week. I came across this question and I am unsure of the answer. Any insight would be greatly appreciated.I'm not sure what approach to take in order to answer the question.

In an experiment, 5 cm3 of 1.0 mol/dm3 sodium hydroxide are gradually added to 10 cm3 of 1.0 mol/dm3 hydrochloric acid containing methyl orange. What changes occur in the mixture?

• A)The concentration of H+ ions increase [x- decrease]
• B) The methyl orange changes colour
• C) More water molecules are formed- [x water is formed (but use of the word 'more'??)]
• D) A precipitate is formed [x- no ppt formed, NaCl is soluble]

I thought the answer would be B. However when thinking about the question the methyl orange would be red in the acid and given the proportions of the reactants and the 1:1 mole ratio, the HCl would be in excess, so would it still change colour?